160A Double Molded Case Circuit Breaker / Four Pole Adjustable Circuit Breaker
KRIPAL has the Utility Model Patent for the structure of double making & double breaking!
The UKM32 series MCCB are used for making, breaking, and protection of low-voltage distribution systems and motors. Several breaking capacities exist for each model of circuit breaker, meeting
the demands for varying types of protection. Several different rated current levels are available for
each frame size
|
Model
|
Rated current (A)
|
|
UKM32-160
|
16
|
20
|
25
|
32
|
40
|
50
|
63
|
80
|
100
|
125
|
160
|
|
UKM32-250
|
40
|
50
|
63
|
80
|
100
|
125
|
160
|
200
|
250
|
-
|
-
|
|
UKM32-630
|
300
|
400
|
500
|
630
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
Description:
1. Thermal magnetic adjustable
2. Double making & double breaking design
3. Contacts: 85% AgCdo
4. Metal parts: cooper
5. Plastic Parts: brand-new materials
6. High breaking capacity.
7. Bearing Rotating shaft
8. The max breaking capacity of each model is up to 150 kA
9. U-type fixed contact design
10. Don't contain any noxious substances and its manufacturing And processing are performed in accordance
with the requirements of ISO14001.
Specifications:
|
MCCBs for power distribution
|
UKM32-160
|
UKM32-250
|
UKM32-630
|
|
Frame size
|
160
|
250
|
630
|
|
Rated current, In
|
16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160
|
40, 50, 63, 80, 100, 125, 160, 200, 250
|
300, 400, 500, 630
|
|
Poles
|
3, 4,
|
3, 4,
|
3
|
|
Rated operational Voltage, Ue
|
AC (V)
|
690
|
690
|
690
|
|
DC (V)
|
500
|
500
|
500
|
|
Rated impulse withstand voltage, Uimp
|
8
|
8
|
8
|
|
Rated insulation voltage. Uimp
|
750
|
750
|
750
|
|
Rated ultimate short circuit breakering capacity, Icu
|
N
|
N
|
N
|
|
AC 50/60HZ
|
220/240V (KA)
|
85
|
100
|
100
|
|
380/415V (KA)
|
50
|
85
|
65
|
|
440/460V (KA)
|
50
|
70
|
65
|
|
480/500V (KA)
|
30
|
50
|
42
|
|
660/690V (KA)
|
5
|
8
|
10
|
|
DC
|
250V (KA)
|
42
|
65
|
50
|
|
2 poles in series
|
500V (KA)
|
42
|
65
|
50
|
|
Rated service breaking capacity, Ics(%Icu)
|
100%
|
100%
|
100%
|
Current-limiting Capacity:
Current limiting means the limiting increase of the short circuit current in a circuit. In a circuit protected
by the UKM32 product series, both the peak value and energy l2t of the short circuit current generated
are far less than expected.
A. U -Type fixed contact design
The pre-breaking technique may be realised by means of a unique U-Type fixed contact.
The pre-breaking technique refers to that of the electrodynamic force generated throuth the U-Type
fixed contact and that wnich occurs on moving contact system. The higher the short circuit current,
the bigger the repulsive electrodynamic forces they generate simultaneously. Prior to releasing,
the electrodynamic repulsive forces may separate the moving contact from the fixed contact, and the
equivalent resistance between these two contacts is increased by streching the electrical arc.
B. Double making & double breaking design
The current-limiting function of the pre-breaking technique is enhanced because of increase in instantaneous arc resistance and arc voltage and a fast drop in the current increase rate.
Reduces the damage and loss of equipment and the power lines caused by a short circuit current,
improves the safety, and cuts down on the cost of a secondary protection device.
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