NJBK9 판매점 - Motor Protection Relay

NJBK9 반도체 회로 부품 판매점

Motor Protection Relay

CHiNT

NJBK9 Motor protection relay

1. General

NJBK9 series motor protection relay (hereinafter

referred to as “Pro-tecter”) is used for overload protection,

locked rotor protection, phase failure protection, three-phase

unbalance protection, grounding protection and PTC

temperature protection for AC electromotors of a frequency

of 50Hz with a rated insulation voltage of up to 690V and a

rated operating current of 1A-200A during long-term and

discontinuous operation.

This protector is provided with RS485 interface and 4-20mA

current loop transmitter interface for network communication

and performs remote monitor & control on the motor and

fault query through opper computer.

This protecter is usually used to combine with AC contactor.

Standards: IEC 60947-4-1

2. Type designation

N JBK 9 - □ □ □/□/□

Relay

Protection Relay

Control power supply voltage

(AC220V, AC380V, AC/DC100V~240V)

Rated current: 5, 10, 30, 50, 200

None: 4mA~20mA analog transformation

is not available

M: 4mA~20mA analog transmission

None: Communication interface is not available

T: RS485 communication interface

Enclosure grade: 50, 200

Design sequence No.

Motor protection relay

Company code

3. Operation conditions

3.1 Altitude: should not exceed 2000m;

3.2 Ambient tempeature: -5℃~+40℃, and the average

temperature in 24h should not exceed +35℃;

3.3 Atmospheric conditions: The relative air humidity should not

exceed 50% at the maximum temperature of +40℃. The

relative humidity may be higher at lower temperatures, for

example, the air humidity can be up to 90% at +20℃. Special

measures should be taken if condensation occurs on the product

occasionally due to temperature variation;

3.4 Pollution degree: 3;

3.5 The inclination between the mounting plane and the vertical

plane should not exceed ±5°;

3.6 In non-explosive media that do not contain a sufficient

amount of gas or conductive dust to cause metal corrosion or

insulation failure;

3.7 In places with rain and snow protection equipment and not

full of vapor;

3.8 In places where there is no significant shake, impact or

vibration;

3.9 Mounting category: Ⅲ;

3.10 Degree of protection of enclosure: IP20.

I-23

> >>

Relay

Protection Relay

4. Technical data

4.1 Main circuit: rated insulation voltage: AC690V, rated frequency: 50Hz

Model

NJBK9-50□□/5/□

NJBK9-50□□/10/□

NJBK9-50□□/30/□

NJBK9-50□□/50/□

NJBK9-50□□/200/□

Setting current (A)

200

Setting current range (A)

1~5

2~10

6~30

10~50

40~200

Matching motor power (kW)

0.5~2.5

1~5

3~15

5~25

20~100

4.2 Auxiliary circuit: rated insulation voltage: AC380V, rated frequency: 50Hz, data of auxiliary contact

Usage category

Rated operational voltage Ue(V)

Rated operational current Ie(A)

Conventional heating current Ith(A)

AC-15

240

1.5

380

0.95

4.3 Product selection table

Model

NJBK9-50/□/□

NJBK9-50T/□/□

NJBK9-50M/□/□

NJBK9-50TM/□/□

NJBK9-200/□/□

NJBK9-200T/□/□

NJBK9-200M/□/□

NJBK9-200TM/□/□

Overload

◆

Phase failure

◆

Ground

◆

PTC

◆

Communication

◆

4mA~20mA

◆

Unbalance

◆

Locked

rotor

◆

4.4 Structural features

4.4.1 Split mounting;

4.4.2 LCD display, key setting;

4.4.3 Has start delay function;

4.4.4 Has fault memory function, permits inquiry of fault record;

4.4.5 Has RS485 interface, supports MODBUS protocol, permits network communication;

4.4.6 With 4mA-20mA analog output interface;

4.4.7 Has two groups of output contacts, 1Z protection contact and 1H auxiliary contact, and permits autotransformer reduced voltage

starting and star-delta starting;

4.4.8 Power consumption: ≤3VA.

5. Protection charactersitics

5.1 Operating characteristics of overload protection

Overload

curve

Kr=1

Kr=2

Kr=3

Kr=4

Kr=5

Overload multiple

Operation

time (s)

1.1 1.2 1.5

6 7.2

75 63 40 22 3.6 2.5 1.8

150 125 80 45 7.2 5 3.5

298 250 160 90 14 10 6.9

595 500 320 180 29 20 14

892 750 480 270 43 30 21

Note

In conformity with Class 10A

In conformity with Class 10

In conformity with Class 20

In conformity with Class 30

> >> I-24

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NJBK9 relay

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국내 전력반도체 판매점

상호 : 아이지 인터내셔날

전화번호 : 051-319-2877

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NJBK9 반도체 회로 부품 판매점

Motor Protection Relay

국내 전력반도체 판매점

일반적인 전자부품 판매점

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