ZN85-40.5 Indoor High Voltage Vacuum Circuit Breaker

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ZN85-40.5 Indoor High Voltage Vacuum Circuit Breaker

Summary

ZN85-40.5(3AV3) indoor high voltage vacuum circuit breaker is of rated voltage 40.5kV, three-phase and AC 50/60Hz. It applies to mining firms, power house and substation acting as protection and control electric apparatus. It is also applicable in occasions with frequent operation.

Ambient condition

1. Altitude: ≤1000m;2. Ambient temperature: -25℃~+40℃;3. Relative humidity: daily average ≤95％, monthly average ≤90％;4. Earthquake intensity: ≤8 degree;5. Applicable occasions should free from inflammables, explosives, corrosivesand severe vibration.

Structure feature

1. The arc-extinguish chamber is on the upper part and the mechanism is on the lower part. This structure is convenient for debug.2. Complex insulating structure using air and organic material; Compactable dimension and small weight.3. Vacuum arc-extinguish chamber of Cutler-Hammer Company (USA) and domestic ZMD are both applicable for the VCB. Both twokinds of chambers extinguish arc by vertical magnetic field and featuring with low cut-off and good on-off capability with asymmetry.4. Simple spring operation mechanism is free from maintenance within 10000 times of operations.5. Lead-screw propeller, easy and stable operation and good self-locking capability.

ZN85-40.5 Indoor High Voltage Vacuum Circuit Breaker

Technical specification

No.	Ltem		Unit	Data
1	Rated voltage		KV	40.5
2	Rated current		A	1250		1600	2000、2500
3	Rated short circuit breaking current		KA	25	31.5	25	31.5
4	Rated dynamic stability current (peak)		KA	63	80	63	80
5	4S thermal stability current		KA	25	31.5	25	31.5
6	Rated short circuit dosing current (peak)		KA	63	80	63	80
7	Rated short circuit current breaking time		Times	20
8	Rated operating sequence			0-O.3s-C0-I80s-C0
9	Rated insulation voltage level	1 min power frequency withstand voltage	KV	95
		Lightning impulse withstand voltage(peak)		185
10	Mechanical life		Times	10000
11	Rated single capacitor bank opening and closing current		A	630
12	Rated back-to-back capacitor bank current		A	400
13	Rated voltage of energy storage motor		V	AC、DC：110; 220
14	Rated power of energy storage motor		W	≤230
15	Energy storage time of energy storage motor		s	≤15
16	Rated voltage of opening and closing coil		V	DC：110;220
17	Rated current of opening and closing coil		A	1.05(110V) 0.96(220V)
18	Contact stroke		mm	20±2
19	Contact contact stroke		mm	7.5 ±1.5
20	Three-phase opening,dosing phase asynchronous		ms	≤2
21	Contact closing bounce time		ms	≤3
22	The main circuit resistance (not include the contact arm)		M Q	≤40