Download Protection Relay NJBK1 Series Motor Protector

Relay
Protection Relay
3. Operating conditions
3.1 Altitude: No more than 2000m.
3.2 Ambient air temperature is -5℃~+40℃,and the average
value within 24h shall not exceed+35℃.
3.3 Atmospheric conditions: When the maximum temperature
is + 40 ℃,the air relative humidity shall not exceed 50%, and
a higher relative humidity is allowable at lower temperatures,
for example: at +20℃,the air humidity can reach 90%, and
special measures shall be taken to condensation occasionally
produced due to temperature changes.
3.4 Class of pollution: 3.
3.5 Inclination between the mounting surface and vertical plane
shall not exceed±5°.
3.6 In places without explosion hazard media and no enough
gases to corrode the metal and damage the insulation in the
media and more conducting dust.
3.7 In places equipped with rain and snow prevention equipment
and without steam.
3.8 In places without significant shake, shock and vibration.
3.9 Installation category: Ⅲ.
NJBK1 Series Motor Protector
1. General
NJBK1 series motor protector (hereinafter referred to as
protector) is applicable to the overload, open-phase,
three-phase current imbalance and other protection
for the AC motors in long-term or intermittent operations
with AC frequency at 50Hz, rated insulation voltage at
690V or below and rated operating current at 1A-400A.
2. Type designation
N JBK 1 - □/□ □
Rated control supply voltage
(AC220V, AC380V)
Setting current code(5 : 1A~5A,
10:2A ~ 10A,30:6A ~ 30A, 80:16A~80A,
200:40A~200A, 400:80A~400A)
Frame size: 80,400
Design serial number
Motor protector
Enterprise characteristic code
17
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3.10 Electromagnetic environment: Environment B.
3.11 Shell protection grade: IP20.
3.12 Rated duty: Uninterrupted duty or eight-hour day working
system.
Relay
Protection Relay
4. Technical data
4.1 Main circuit: Rated insulation voltage: AC690V; rated frequency: 50Hz.
Rated current: A
Model
Setting current range: A
Suitable motor power: kW
NJBK1-80/5
5
1-5
0.5～2.5
NJBK1-80/10
10
2-10
1～5
NJBK1-80/30
30
6-30
3～15
NJBK1-80/80
80
16-80
8～40
NJBK1-400/200
200
40-200
20～100
NJBK1-400/400
400
80-400
40～200
4.2 Auxiliary circuit: Rated insulation voltage: AC380V; rated frequency: 50Hz; use category, rated working voltage, rated operating
current and conventional thermal current.
Use category
AC-15
Rated operating voltage (V)
240
Rated operating current (A)
1.5
380
0.95
Conventional thermal current(A)
5
5. Structure characteristic
5.1 Structure characteristic
5. 1.1Knob setting current value and trip grade.
5.2 LED displays the current value, setting state, fault code and other information about the maximum phase.
5.3 With overload inverse time-lag protection, open-phase protection, three-phase current unbalance protection and other functions.
5.4 5 optional built-in overload curves,meet the use at different occasions.
5.5 Test / Reset: Operating status, press "Test / Reset" button for a short time to conduct simulated action test, and press it for a long time
to enter setup mode; press this button to reset under fault conditions.
5.6 Pluggable terminal blocks, facilitate user connection.
5.7 Integrated design, simple structure, two installation methods of guide rail installation and screw mounting.
5.8 Fault memory and its instruction. In case of motor failure, LED flashes alternately and displays the fault code and maximum phase
current value.
6. Protective characteristics
6.1 Overload operating characteristics
Overload multiple
Action
Overload
curve
1.05
1.2
1.5
2
5
No action
63
40
22
3.6
6
7.2
Remark
2.5
1.8
Conform to Level 5
time (s)
Kr=1
Kr=2
No action
125
80
45
7.2
5
3.5
Conform to Level 10A
Kr=3
No action
250
160
90
14
10
6.9
Conform to Leve l 10
Kr=4
No action
500
320
180
29
20
14
Conform to Leve l 20
Kr=5
No action
750
480
270
43
30
21
Conform to Leve l 30
6.2 Open-phase protection action characteristic
When any one phase current of the three-phase current of the main circuit is 0, the protector acts for 3s, with a relative error of±20%.
6.3 Action characteristics of three-phase current unbalance protection
When three-phase current of the main circuit complies with the formula below, the protector acts for 3s, with a relative error of±20%.
3
Max|I i-I avg|
i=1
I avg
×100%＞30%
Where:
I i: Current effective value per phase
I avg: Average value of three-phase current effective value
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6.4 Tripping characteristic
Time - current characteristic curve
8. Overall and mounting dimensions (mm)
100min
50min
20min
10min
5min
1min
50s
20s
Kr=5
10s
101max
2min
2 / T 1
Kr=4
5s
4 / T 2
3×Φ16
Kr=3
Kr=2
2s
6 / T 3
125max
Kr=1
1s
2
1
5
8
×Iset
10
7. Wiring diagram
3
73max
10A
20
2
30
5
Control power supply voltage AC220V wiring diagram
脱扣 等级 设定
断相
电流 设定
不平衡
A相电流
测试
B相电流
4
1
脱扣 等级
过载
5
电流(A)
长按3s
设置——运行
测试
复位
C相电流
NJBK1电动机保护器
113±0.29
L1
L2
L3
N
FU1
QS
W1
U1
V1
KM
FU1
W2
V2
U2
V3
U3
A1
KM
W3
A2
98
95
08
07
NJBK1 serises motor protector
QF1
QF1 AC220V
W4
U4
V4
M
2/T1
6/T3
4/T2
34max
121max
3~
24max
Control power supply voltage AC380V wiring diagram
L3
L2
155max
L1
FU1
QS
V1
U1
FU1
10
72.5max
W1
KM
FU2
W2
U2
V2
KM
W3
A1
A2
98
95
08
20
10A
30
5
过载
断相
不平衡
测试
脱扣等级设定
电流设定
起动延时设定
A相电流
B相电流
C相电流
脱扣等级
80/15
120/30
160/45
40/0
200/60
电流(A)/起动延时(s)
长按3s
设置 —— 运行 测试
复位
NJBK1电动机保护器
07
142.5±0.35
V3
U3
NJBK1 serises motor protector
QF1
QF1 AC380V
W4
U4
V4
M
3~
9. Ordering information
9.1 Name and type specification of protector
Select the control power supply voltage (AC220V, AC380V)
according to the operating requirements
Setting current range (1A~5A, 2A~10A, 6A~30A,16A~80A,
40A~200A,80A~400A)
9.2 Order quantity
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