NJBK5 반도체 회로 부품 판매점
Motor Controller
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 CHiNT |
Relay
Protection Relay
NJBK5 Motor Controller
1. General
NJBK5 series motor controller (hereinafter referred to as
controller) is mainly used in circuits with a frequency of AC
50Hz (or 60Hz), a rated operational voltage of up to 380V
and a rated control power of up to 11kW (current up to
22A) to control the direct start and stop of water pumps or
motors, provide motors with overload and phase failure
protection, and realize automatic liquid level control for
civil water towers and reservoirs.
This product is not applicable to the liquid level control
of low-conductivity liquids, such as oil, purified water,
inflammable and explosive chemical liquids and high-
density sewage.
Standards: IEC 60947-4-1.
2. Type designation
N JBK 5 - □ □ / □ □
Rated operational current
Rated control supply voltage
Function code
Blank: with liquid level relay
D: without liquid level relay
10: frame size code
Design sequence No.
Motor controller
Company code
3. Operation conditions
3.1 Altitude: the altitude of the mounting location 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 at the
mounting location should not exceed 50% at the maximum
temperature of +40℃. The relative humidity may be higher at
lower temperatures. Special measures should be taken if
condensation occurs on the product occasionally due to
temperature variation;
3.4 Pollution degree: 3;
3.5 Mounting category: Ⅲ;
3.6 In places where there is no significant vibration or impact;
3.7 In non-explosive media that do not contain a sufficient
amount of gas or dust to cause metal corrosion or insulation
failure;
3.8 In places where rain and snow protection is provided;
3.9 The inclination from the vertical plane should not exceed 5°.
I
> >> I-10
Relay
Protection Relay
4 Technical data
4.1 Main data and technical characteristics
Type
NJBK5-10 0.72A~2.4A
NJBK5-10D 0.72A~2.4A
NJBK5-10 3.5A~11A
NJBK5-10D 3.5A~11A
NJBK5-10 10A~16A
NJBK5-10D 10A~16A
NJBK5-10 20A~25A
NJBK5-10D 20A~25A
Conventional
heating
current (A)
Max. rated power (kW)
AC-3
380V
220V
Model of
matching
AC contactor
Model of
Setting
matching
current
motor protector range (A)
Number of
turns of
protector (turn)
2.4
1.1 0.55
CJX2-1210
JD-8/0.5A~5A 0.72~2.4
5
12
5.5 3
CJX2-1210
JD-8/2A~20A
3.5~11
1
16
7.5 4
CJX2-1810
JD-8/2A~20A
10~16
1
25
11 5.5
CJX2-2510
JD-8/20A~80A
20~25
1
4.2 Rated control supply voltage Us: AC220V, AC380V.
4.3 Degree of protection of enclosure: IP55.
4.4 Protection characteristics of the controller
4.4.1 Phase failure protection characteristics of the controller: In case of failure of any phase of the three-phase main circuit passing
through the center hole of the motor comprehensive protector in the controller, the motor comprehensive protector operates for a
period of ≤5s.
4.4.2 Overload protection characteristics of the controller under balanced three-phase load.
No.
Setting current
multiple
Operation time
1
1.05
No operation within 2h
2 1.2 Operation within 2h
3
1.5
Tripping class
30
4
7.2
Tripping class
30
4.5 Down-lead distance of liquid level control electrode: 200m max.
4.6 Mounting type: installation type.
Starting conditions
≤12min
9s<Tp≤30s
Cold state start
Start after No.1
Start after applying a 1.0 times setting current for 2h
Cold state start
5. Features
The controller consists of a CJX2 series AC contactor, a JD-8 series motor comprehensive protector and an NJB1-YW1 liquid level relay
in a protective enclosure and is divided into two types, with liquid level relay and without liquid level relay. Products with liquid level relay
are used to control the start and stop and automatic pumping and drainage of water pumps and provide overload and phase failure
protection. Products without liquid level relay are used to control the start and stop of motors and provide overload and phase failure
protection.
Setting of the motor comprehensive protector in the controller is required before it is connected and put into use.
6. Wiring diagram
a. Connection diagram of NJBK5-10 in case both the control
circuit voltage and the main circuit voltage are AC380V
b. Connection diagram of NJBK5-10 in case the main circuit
voltage is AC380V and the control circuit voltage is AC220V
L1 L2 L3
FU
L1 L2 L3 N
FU
1/L1 3/L2 5/L3
KM
2/T1 4/T2 6/T3
JD-8
UV W
M
3～
A1 A1
KM NJB1-YW1
A2 A2
96
JD-8
95
STP NJB1-YW1
E1 E2 E3
High
Medium
Pool Low
11
NJB1-YW1
14
14NO
13NO KM
ST
1/L1 3/L2 5/L3
KM
2/T1 4/T2 6/T3
JD-8
U VW
M
3～
A1 A1
KM NJB1-YW1
A2 A2
96
95 JD-8
STP NJB1-YW1
E1 E2 E3
High
Medium
Pool Low
11 14NO
NJB1-YW1
14 13NO KM
ST
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NJBK5 controller
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국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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전력반도체 문의 : 010-3582-2743
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