ZW32-24 Series Outdoor High Voltage Vacuum Circuit Breaker

Our ZW32-24 outdoor vacuum circuit breakers deliver reliable switching for 24kV distribution systems with compact size, anti-condensation design, and maintenance-free operation in harsh environments.

• Rated at 24kV, 630A, with 20kA short-circuit breaking and 50kA making current.

• Mechanical life of 10,000 operations with ≥30 short-circuit breaking operations.

• Power frequency withstand voltage of 65/79kV and lightning impulse withstand of 125/145kV for superior insulation.

• Available with isolating function and manual or electric operation options.

• Fast delivery, reliable quality, responsive service, and extensive project experience backed by our company.

Product Overview

The ZW3224 outdoor high voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") is an outdoor distribution equipment with a rated voltage of 24 kV and threephase AC 50 Hz. It is primarily used for making and breaking load currents, overload currents, and shortcircuit currents in power systems. It is suitable for protection and control applications in substations and industrial power distribution systems, as well as in rural power networks where frequent operation is required.

This circuit breaker features compact size, light weight, anticondensation design, and maintenancefree operation, enabling it to adapt to harsh climatic conditions and polluted environments.

Technical Specifications

S.Q.	Item	Unit	Parameter
1	Rated Voltage	KV	24
2	Rated Frequency	Hz	50
3	Rated Current	A	630
4	Rated ShortCircuit Breaking Current	KA	20
5	Rated Peak Withstand Current (Peak)	KA	50
6	Rated ShortTime Withstand Current	KA	20
7	Rated ShortCircuit Making Current (Peak)	KA	50
8	Mechanical Life	times	10000
9	Rated Number of ShortCircuit Breaking Operations	times	≥30
10	Power Frequency Withstand Voltage (1min): (Wet)(Dry) PhasetoPhase, PhasetoEarth / Across Isolating Gap	KV	65/79
11	Lightning Impulse Withstand Voltage (Peak) PhasetoPhase, PhasetoEarth / Across Isolating Gap	KV	125/145
12	Power Frequency Withstand Voltage (1min) for Secondary Circuits	KV	2

Model and Designation

ZW 3224 / T 63020 G □

ZW: Outdoor Vacuum Circuit Breaker

32: Design Serial Number

24: Rated Voltage (kV)

T: Spring Operating Mechanism

630: Rated Current (A)

20: Rated ShortCircuit Breaking Current (kA)

G: With Isolating Function

□: S Manual Operation, D Electric Operation

Compliant Standards

GB1984 "AC HighVoltage Circuit Breakers"

GB11022 "Common Specifications for HighVoltage Switchgear and Controlgear Standards"

GB311.16 "Insulation Coordination for HighVoltage Transmission and Transformation Equipment"

GB763 "Heating of AC HighVoltage Electrical Equipment Under LongTerm Operation"

GB2706 "Dynamic and Thermal Stability Test Methods for AC HighVoltage Electrical Equipment"

GB3309 "Mechanical Tests for HighVoltage Switchgear at Ambient Temperature"

DL/T593 "Common Technical Requirements for Ordering HighVoltage Switchgear"

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