ZN63A-24 Indoor High-Voltage AC Vacuum Circuit Breaker

ZN63A-24 indoor high voltage AC vacuum circuit breaker (hereinafter referred to as circuit breaker) is used in three-phase AC 50Hz indoor places with rated voltage of 24kV.
The circuit breaker comply with GB/T 1984 "High-voltage alternating-current circuit-breakers", GB/T 11022" Common specifications for high-voltage switchgear and controlgear standard", DL/T 402 "High-voltage alternating-current circuit-breakers", and IEC standard.

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Catalog

ZN63A-24.pdf

Certificate

Overview

Working environment conditions:

1.1 Ambient temperature: Max. +40℃, Min.-15℃ (storage and transport at -30℃ are allowed

1.2 Relative humidity: Daily mean ≤95%; monthly mean ≤90%; Daily mean vapor pressure ≤ 1.2kPa; monthly mean vapor pressure ≤ 1.8kPa;

1.3 Altitude: Not exceed 1,000 meters.

1.4 Seismic intensity does does not exceed 8 magnitude scales.

1.5 There is no obvious pollutions such as dust, smoke, corrosive or flammable gas, steam gas, or salt spray in the ambient air.

1.6 The magnitude of the electromagnetic interference induced in the secondary system does not exceed 1.6kV. Note: If deviation of normal service conditions occurs, the customer should negotiate with the manufacturer.

Item	Unit	Value
Rated voltage	kV	24
Rated power frequency withstand voltage (1 min)		Open contacts 79, phase to phase and to earth 65

Rated lightning impulse withstand voltage (peak)		Open contacts 145, phase to phase and to earth 125

Rated frequency	Hz	50
Rated current	A	630 1250	630 1250 1600 2000 2500 3150		1250 1600 2000 2500 3150

Rated short-circuit breaking current	kA	20、25	31.5		40
Rated short-circuit making current		50、63	80		100
(peak)
Rated short-time withstand current		20、25	31.5		40
Rated peak withstand current		50、63	80		100
Rated short circuit duration	s	4
Rated operation sequence		O—0.3s—CO—180s—CO		O—180s—CO—180s—CO
Rated short-circuit breaking current	Times	50		30
breaking times
Mechanical life		10,000(Customized)
Rated operating voltage	V	220/110