MD1501 series x instruction manual EN overseas general x r1 03

MD1501 Series Auxiliary Relay Instruction Manual NR Electric Co , Ltd Preface MD1501 Series Auxiliary Relay i Date 2017 08 17 Preface Introduction This guide and the relevant operating or service manual documentation for the equipment provide full information on safe handling, commissioning and testing of this equipment Documentation for equipment ordered from NR is dispatched separately from manufactured goods and may not be received at the same time Therefore, this guide is provided to ensure.

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MD1501 Series Auxiliary Relay Instruction Manual

NR Electric Co., Ltd.

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Before carrying out any work on the equipment, the user should be familiar with the contents of this manual, and read relevant chapter carefully

This chapter describes the safety precautions recommended when using the equipment Before installing and using the equipment, this chapter must be thoroughly read and understood

Health and Safety

The information in this chapter of the equipment documentation is intended to ensure that equipment is properly installed and handled in order to maintain it in a safe condition

When electrical equipment is in operation, dangerous voltages will be present in certain parts of the equipment Failure to observe warning notices, incorrect use, or improper use may endanger personnel and equipment and cause personal injury or physical damage

Before working in the terminal strip area, the equipment must be isolated

Proper and safe operation of the equipment depends on appropriate shipping and handling, proper storage, installation and commissioning, and on careful operation, maintenance and servicing For this reason, only qualified personnel may work on or operate the equipment

Qualified personnel are individuals who:

 Are familiar with the installation, commissioning, and operation of the equipment and of the system to which it is being connected;

 Are able to safely perform switching operations in accordance with accepted safety engineering practices and are authorized to energize and de-energize equipment and to isolate, ground, and label it;

 Are trained in the care and use of safety apparatus in accordance with safety engineering practices;

 Are trained in emergency procedures (first aid)

Instructions and Warnings

The following indicators and standard definitions are used:

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DANGER! means that death, severe personal injury and considerable equipment damage

will occur if safety precautions are disregarded

WARNING! means that death, severe personal and considerable equipment damage

could occur if safety precautions are disregarded

CAUTION! means that light personal injury or equipment damage may occur if safety

precautions are disregarded

NOTICE! is particularly applies to damage to device and to resulting damage of the protected

equipment

DANGER!

NEVER allow a open current transformer (CT) secondary circuit connected to this

device while the primary system is live Open CT circuit will produce a dangerously high voltage that cause death

Do NOT touch the exposed terminals of this device while the power supply is on The

generated high voltage causes death, injury, and device damage

WARNING!

Thirty seconds is NECESSARY for discharging the voltage Hazardous voltage can be

present in the DC circuit just after switching off the DC power supply

CAUTION!

 Earthing

Securely earthed the earthing terminal of the device

 Operating environment

ONLY use the device within the range of ambient environment and in an

environment free of abnormal vibration

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 Ratings

Check the input ratings BEFORE applying AC voltage/current and power supply to

the device

 Printed circuit board

Do NOT attach or remove printed circuit board if the device is powered on

The firmware may be upgraded to add new features or enhance/modify existing

features, please MAKE SURE that the version of this manual is compatible with the

product in your hand

We reserve all rights to this document and to the information contained herein Improper use in particular reproduction and dissemination

to third parties is strictly forbidden except where expressly authorized

The information in this manual is carefully checked periodically, and necessary corrections will be included in future editions If nevertheless any errors are detected, suggestions for correction or improvement are greatly appreciated

We reserve the rights to make technical improvements without notice

NR ELECTRIC CO., LTD

Headquarters: 69, Suyuan Avenue, Jiangning, Nanjing 211102, China

Manufactory: 18, Xinfeng Road, Jiangning, Nanjing 211111, China

Tel: +86-25-87178888 Fax: +86-25-87178999 Website: www.nrelect.com , www.nrec.com

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Documentation Structure

The manual provides a functional and technical description of this relay and a comprehensive set

of instructions for the use and application of MD1501 series auxiliary relays

All contents provided by this manual are summarized as below:

5 Commissioning

Introduce how to commission the relay, comprising checks on the calibration and functionality of the relay

6 Maintenance

A general maintenance policy for the relay is outlined

7 Decommissioning and Disposal

A general decommissioning and disposal policy for the relay is outlined

8 Manual Version History

List the instruction manual version and the modification history records

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1 Introduction

Table of Contents

1 Introduction 1-a

1.1 Application 1-1 1.2 Function 1-1 1.3 Features 1-1 1.4 Type 1-1

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MD1501 series auxiliary relays provide functions as follows:

 Trip circuit supervision

 Lockout function

 Tripping relay function

 Repeat relay function (voltage operated or current operated)

 AC voltage switching function

 Adaptive mounting modes, the relay modules can be accommodated in a casing installed on

a panel as a relay device

 High burden of the relay for tripping or closing circuit breaker has strong interference withstand capability

 More spare relays can be provided and flexible applied

1.4 Type

MD1501 series auxiliary relays can be classified in following types according to their functions

Table 1.4-1 Types of MD1501 series auxiliary relay

MD1501-551 Trip circuit supervision with current operated auxiliary relay

MD1501-552 Phase segregated trip circuit supervision

MD1501-556 Current operated auxiliary relay (3 elements)

MD1501-561 Bi-stable switching relay

MD1501-571 Electrical reset auxiliary element with internal operating coil supervision (high burden)

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MD1501-572 Self reset auxiliary relay with electrical reset LED indicator (high burden)

NOTICE!

Devices may be upgraded to amend or enhance functions, please ENSURE that this

manual version is compatible with your devices

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2 Technical Data

2 Technical Data 2-a

2.1 Electrical Specifications 2-1 2.2 Mechanical Specifications 2-1 2.3 Ambient Temperature and Humidity Range 2-1 2.4 Type Tests 2-1 2.5 Certifications 2-2 2.6 Main Technical Data of Each Relay 2-3

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2.1 Electrical Specifications

Power Supply (Voltage Operated Element)

Rated Voltage 110Vdc, 125Vdc, 220Vdc, 250Vdc

Ripple in the DC auxiliary voltage Max 15% of the DC value IEC 60255-11:1979

Operating condition < 120W

2.2 Mechanical Specifications

Enclosure dimensions (W×H×D) 35.5×173.8×198 (unit: mm)

Trepanning dimensions (W×H) 36.4×154(unit: mm), M3 screw

Weight per relay Approx 1kg

Housing material Aluminum, steel

Location of terminal Back side

Enclosure Protection IEC60529:1989

Rear side, connection terminals IP20

2.3 Ambient Temperature and Humidity Range

Dry cold test IEC 60068-2-1:1974 Test Ad for 16 h at -25°C

Dry heat test IEC 60068-2-2:1990 Test Bd for 16 h at +55°C

Damp heat test, cyclic IEC 60068-2-30:1980 Test Db Two (12+12) hour cycles 95%RH, low

temperature -25°C, high temperature +55°C

2.4.2 Mechanical Tests

Vibration IEC60255-21-1:1988 Class I

Shock and bump IEC 60255-21-2:1988 Class I

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2.4.3 Electrical Tests

Dielectric tests IEC 60255-5:2000 Test voltage 2kV, 50Hz, 1min

Impulse voltage tests IEC 60255-5:2000 Test voltage 5kV, unipolar impulses waveform

1.2/50μs,source energy 0.5J Insulation resistance measurements IEC 60255-5:2000 Isolation resistance >100MΩ, 500Vdc

2.4.4 Electromagnetic Compatibility

1MHz burst disturbance test

IEC 60255-22-1:1988 (idt IEC61000-4-12:1995) Common mode: class III 2.5kV

Differential mode: class III 1.0kV

Radio frequency interference tests

IEC 60255-22-3:2007 class III Frequency sweep

Radiated amplitude-modulated 10V/m (rms), f=80~1000MHz Spot frequency

Radiated amplitude-modulated 10V/m (rms), f=80MHz/160MHz/450MHz/900MHz Radiated pulse-modulated

10V/m (rms), f=900MHz

Electrostatic discharge test

IEC60255-22-2:1996 (idt IEC 61000-4-2:2006) class IV For contact discharge: 8kV

For air discharge: 15kV

Fast transient disturbance tests

IEC 60255-22-4:2002 (idt IEC 61000-4-4:2004) Power supply, I/O, Earth: Class IV, 4kV, 2.5 kHz, 5/50ns Communication terminals: Class IV, 2kV, 5 kHz, 5/50ns

Surge immunity test

IEC 60255-22-5:2002 (idt IEC 61000-4-5:1995) class IV Power supply, AC input, I/O port: 4kV, line to earth; 2kV line to line, 1.2/50us

Conducted RF Electromagnetic

Disturbance

IEC 60255-22-6:2001, Class III Power supply, AC, I/O, Comm Terminal: 10Vrms, 150 kHz~80MHz Power Frequency Magnetic Field

Immunity

IEC 61000-4-8:2001, Class V 100A/m for 1min, 1000A/m for 3s

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 Products safety(PS): 2014/35/EU, EN60255-27:2014

2.6 Main Technical Data of Each Relay

2.6.1 Main Technical Data of Type MD1501-551

 Trip circuit supervision relay

Rated voltage

110Vdc: MD1501-551B 125Vdc: MD1501-551N 220Vdc: MD1501-551A 250Vdc: MD1501-551M

Current of supervision relay coil

<10mA: circuit breaker is closed, the current through relay K1 (220Vdc, 250Vdc)

<5mA: circuit breaker is open, the current through relay K1 and K2 (220Vdc, 250Vdc)

Output contacts Two normally closed contacts, two normally open contacts

Maximum voltage for contact 380Vac, 250Vdc

Voltage withstand for normally open

Current carrying capacity for contact 8A

Overcurrent capacity for contact 50A@200ms, 20A@0.5s, 10A@3s

Breaking capacity for contact

(L/R=40ms) 1.2A@48Vdc, 0.5A@110Vdc, 0.25A@220Vdc

 Current operated relay

Input current

1A~8A: adaptive, S1 and S2 in Figure 3.1-1 are short-circuit in default, S3 and S4 in Figure 3.1-1 are disconnect in default, please refer to Table 3.1-1 to change

Pickup current 0.2A~0.5A: the default value

Rated voltage drop <2V

Output contacts two normally open contacts

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Rated voltage

Current of supervision relay coil

Output contacts two normally closed contacts, two normally open contacts

 Current operated relay

Input current

1A~8A: adaptive, S11 and S12, S21 and S22, S31 and S32 in Figure

3.3-1 are short-circuit in default, S13 and S14, S23 and S24, S33

and S34 in Figure 3.3-1 are disconnect in default, please refer to

Table 3.3-1 to change

Pickup current 0.2A~0.5A: the default value

Rated voltage drop <2V

Output contacts 3 groups, two normally open contacts per group

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Rated voltage

Output contacts 4 groups of switching contacts, one group of signal contact

NOTICE!

Please ENSURE the state of bi-stable relays matches with site current status when put

in service

High burden electrical reset auxiliary relay:

Rated voltage

Rated power consumption

<2W: normally operating condition, the relay does not operate

<120W: the moment that the relay operates

<6W: the relay operates but the initiation contact is still closed

Pickup power >25W: 220Vdc, 250Vdc

>9W: 110Vdc, 125Vdc Current of supervision relay coil 1.5mA

Operating time Maximum value: 10ms, typical value: 6ms

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normally closed contacts), one group of signal contact Maximum voltage for contact 380Vac, 250Vdc

NOTICE!

For the relay, the power is larger at the moment of operating, and the power is less after the operating When testing the relay, users maybe gradually increase the DC voltage subject to the relay under non-operating state, in fact, the power of the relay is larger

under that situation, so each relay should AVOID subjecting to DC voltage for a long

time under non-operating state (not longer than 20s)

High burden self reset auxiliary relay:

Rated voltage

Rated power consumption

<2W: normally operating condition, the relay does not operate

<120W: the moment that the relay operates

<6W: the relay operates but the initiation contact is still closed

Pickup power >25W: 220Vdc, 250Vdc

>9W: 110Vdc, 125Vdc Current of supervision relay coil 1.5mA

Operating time Maximum value: 10ms, typical value: 6ms

Output contacts Ten groups of output contacts, one group of signal contact

NOTICE!

For the relay, the power is larger at the moment of operating, and the power is less after

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the operating When testing the relay, users maybe gradually increase the DC voltage subject to the relay under non-operating state, in fact, the power of the relay is larger

under that situation, so each relay should AVOID subjecting to DC voltage for a long

time under non-operating state (not longer than 20s)

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3 Operation Theory

3 Operation Theory 3-a

3.1 Type MD1501-551 (Trip circuit supervision relay) 3-1 3.2 Type MD1501-552 (Phase segregated trip circuit supervision relay) 3-3 3.3 Type MD1501-556 (Current operated auxiliary relay) 3-5 3.4 Type MD1501-561 (Bi-stable switching relay) 3-7 3.5 Type MD1501-571 (Electrical reset auxiliary relay, high burden) 3-8 3.6 Type MD1501-572 (Self reset relay with electrical reset LED flag) 3-10

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3.1 Type MD1501-551 (Trip circuit supervision relay)

Schematic diagram of type MD1501-551 is shown in Figure 3.1-1

K1

n20

L2 K3

K2

K4 K3

L1

Supervised circuit

K5

n19 n18

Supervised circuit status indication

K4-2

K4-1 n11

n16

n14 K5-2

K5-1

Contacts of supervision relay

n13 n15

n17

V V V

V

52b

Current operated element and output contact (Example of latched connection)

n22 n21

D8

S1 S2 S3 S4

+

-n04

n02 n01

K6-2

K6-1 n03 Contact of current operated relay

n01 n02 n03 n04 n05 n06 n07 n08 n09 n10 n11 n12 n13 n14 n15 n16 n17 n18 n19 n20 n21 n22

K6+

Reserved Reserved

K6-K1+

K2+

K1-

K2-K4-1 K4-1 K4-2 K4-2 K5-1 K5-1 K5-2 K5-2

DC+

DC-K6-1 K6-1 K6-2 K6-2

Figure 3.1-1 Trip circuit supervision relay type MD1501-551

 Trip circuit supervision relay

 Application

Trip circuit supervision function is accomplished by relay K1~K5, the typical connection is shown

as dotted line part in Figure 3.1-1 An alarm will be given by relays K4 and K5 if any of following

conditions happens

1) DC power supply is lost

2) A fault occurs within the tripping circuit

 Principle

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Relays K1 and K2 can accomplish trip circuit supervision, when the circuit breaker is closed, relay K1 is energized and its normally open contact will make to energize relay K3 When the circuit breaker is open, relays K1 and K2 are energized and their normally open contacts connected in parallel will make to energize relay K3 If any of above mentioned abnormal conditions happens, relays K1 and K2 will drop off, consequently relay K3 drops off to initiate LED indicator L2 and reset relays K4 and K5 as well, alarm outputs are provided by relays K4 and K5 Relay K3 is connected in parallel with a RC circuit providing 300ms delay drop off to prevent mal-operation during transition period of tripping

 Principle

Current operated relay K6 is connected in series between an initiation contact and operating device and energized by the through current For the application as a latched element mentioned above, its normally open contact is connected in parallel with the initiation contact (between positive terminal of DC power supply and positive terminal of K6 (i.e n05)) For example of a tripping circuit, protection device operates for an internal fault, K6 will be energized via the protection tripping contact and its normally open contact connected in parallel with tripping contact will close to latch relay K6 until the current path is opened by the circuit breaker auxiliary contact

Tripping contact

Operating device

Figure 3.1-2 Type MD1501-551 is connected with tripping contact as a current latched element

 Main technical data of type MD1501-551

Please refer to Section 2.6.1 about main technical data of type MD1501-551

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Operating current of current operated relay:

Table 3.1-1 Operating current change method of current operated relay of type MD1501-551

Operating current (A) Setting method Pickup current (A)

0.25A disconnect disconnect disconnect disconnect 0.05~0.125

0.50A short-circuit disconnect disconnect disconnect 0.10~0.25

1.00A short-circuit short-circuit disconnect disconnect 0.20~0.50

1.50A short-circuit disconnect short-circuit disconnect 0.30~0.75

2.00A short-circuit short-circuit short-circuit disconnect 0.40~1.00

2.50A short-circuit disconnect disconnect short-circuit 0.50~1.25

3.00A short-circuit short-circuit disconnect short-circuit 0.60~1.50

3.50A short-circuit disconnect short-circuit short-circuit 0.70~1.75

4.00A and above short-circuit short-circuit short-circuit short-circuit 0.80~2.00

3.2 Type MD1501-552 (Phase segregated trip circuit supervision relay)

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L2 K7

K1

K8 K7

n04 n02 K8-2

K8-1

Contacts of supervision relay

n01

n03

V V V

V V

n22 n21

Phase-B

Phase-C

K3 K4 K5 K6

CB tripping circuitry

52b

52b 52b

52a 52a

52a

K8-1 K8-1 K8-2 K8-2

K1+

K2+

K1- K3+

K2- K4+

K3- K5+

K4- K6+

K5- DC+

K6-

DC-K9-1 K9-1 K9-2 K9-2

Figure 3.2-1 Phase segregated trip circuit supervision relay type MD1501-552

 Application

Trip circuit supervision function is accomplished by relay K1~K9 (phase segregated trip circuits

can be supervised simultaneously), the typical connection is shown as dotted line part in Figure

3.2-1 An alarm will be given by relays K8 and K9 if any of following conditions happens

1) DC power supply is lost

2) A fault occurs within the trip circuit of any phase

 Principle

Relays K1~K6 can accomplish phase segregated trip circuit supervision (2 relays for each phase, i.e relays K1 and K2 for A phase, relays K3 and K4 for B phase and relays K5 and K6 for C phase) When phase-A of the circuit breaker is closed, relay K1 is energized and its normally open contact will make to energize relay K7 When phase-A of the circuit breaker is open, relays K1 and K2 are energized and their normally open contacts connected in parallel will make to energize relay K7

Takes trip circuit supervision of phase-A as an example, if any of above conditions happens on

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phase-A circuitry, relays K1 and K2 will drop off, consequently relay K7 drops off to initiate LED indicator L2 and reset relays K8 and K9 as well, similar operation for other phases

Alarm contacts are provided by relays K8 and K9 Relay K7 is connected in parallel with a RC circuit providing 300ms delay drop off to prevent mal-operation during transition period of tripping

3.3 Type MD1501-556 (Current operated auxiliary relay)

Current operated relay 1

n04

n02 n01

K1-2

K1-1 n03

I

n05

n06 K1

K2-2

K2-1 n10

n18

n16 n15

K3-2

K3-1 n17

K1-1 K1-1 K1-2 K1-2 K1+

K1-K3-1 K3-1 K3-2 K3-2 K3+

K3-K2-1 K2-1 K2-2 K2-2 K2+

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main applications is to connect with tripping or closing contact of protection or control device as a current latched element This can prevent tripping or closing contact of protection or control device from arc breaking

 Principle

Current operated relay is connected in series between an initiation contact and operating device and energized by the through current For the application as a latched element mentioned above, its normally open contact is connected in parallel with the initiation contact (between positive terminal of DC power supply and positive terminal of current operated relay (i.e n05, n12 or n19)) The typical application is shown as following diagram, takes relay K1 as an example, if protection device operates for an internal fault, current operated relay will be energized via the protection trip contact and its normally open contact connected in parallel with trip contact will close to latch current operated relay K1 until the current path is opened by the circuit breaker auxiliary contact

Tripping contact

Operating device

Figure 3.3-2 Type MD1501-556 is connected with tripping contact as a current latched element

Operating current of current operated relay:

 Operating current of current operated auxiliary relay

Table 3.3-1 Operating current change method of type MD1501-556

Operating current (A)

Setting method

Pickup current (A) K1: S11

K2: S21 K3: S31

K1: S12 K2: S22 K3: S32

K1: S13 K2: S23 K3: S33

K1: S14 K2: S24 K3: S34 0.25A disconnect disconnect disconnect disconnect 0.05~0.125