Product Overview
AMS Armored Withdrawable Metal-enclosed Switchgear is the latest generation of metal-enclosed switchgear developed under the guidance of senior switchgear experts from China and Germany. This product reaches internationally advanced technical level, and its design and manufacturing fully comply with GB, DL, IEC, DIN/VDE standards as well as the standard requirements of major industrialized countries worldwide.
AMS Indoor AC Metal-enclosed Switchgear features a complete range of specifications:
Rated voltage: 40.5kVRated current: 4000ARated short-circuit breaking current: up to 40kARated peak withstand current: up to 100kA

Applicable Applications
AMS Indoor AC Metal-enclosed Switchgear is particularly suitable for the following occasions:
Power plantsPower distribution networksMetallurgical industryPetrochemical industryUrban infrastructure projects, including airports, ports, subways, etc.Urban high-rise buildings

Complete Technical Parameters (Non-table Format)
Rated voltage: 40.5kV
Rated frequency: 50Hz
Rated Insulation Level
1min Power Frequency Withstand Voltage (RMS Value):
Phase-to-phase & Phase-to-earth: 95kVIsolation disconnecting gap: 118kV

Lightning Impulse Withstand Voltage (Peak Value):
Phase-to-phase & Phase-to-earth: 185kVIsolation disconnecting gap: 215kV

Rated Short-time Power Frequency Withstand Voltage for auxiliary and control circuits (1min): 2kV
Rated current: 1250/1600/2000/2500/3150*/4000*A
Rated short-time withstand current (4s): 25kA / 31.5kA / 40kA
Rated peak withstand current: 63kA / 80kA / 100kA
Rated short-circuit breaking current: 25kA / 31.5kA / 40kA
Rated short-circuit making current (peak value): 63kA / 80kA / 100kA
Internal arc resistance level: 25kA (1s), 31.5kA (1s)
Protection Degree
Enclosure: IP4XWith circuit breaker compartment door open: IP2X