Page 11 - YINGMING POWER(HIGH & LOW VOLTAGE SWITCHGEARS)

KYN61-40.5
ARMORED REMOVABLE AC METAL-
ENCLOSED SWITCHGEAR YINGMING POWER
Structural features

Switchgear structure GB3906-2006 and IEC298 are designed with armored metal-enclosed switchgear standard. The whole is composed of two parts:
cabinet body and withdrawable part (handcart). The cabinet structure is assembled, bolted to form a combination, and the metal partition divides the
interior of the switch cabinet into a circuit breaker room, a main busbar room, a cable room, and a relay instrument room. The protection grade of the
shell reaches IP3X, the protection grade of each compartment is IP2X, and all metal structural parts are reliably grounded. The compartment of the main
circuit system has an independent exhaust pressure release channel.
Handcarts can be divided into circuit breaker handcarts, voltage transformer handcarts, metering handcarts, isolated handcarts, etc. according to their
uses. All the handcarts have the same external dimensions, and handcarts with the same purpose have good interchangeability; handcarts There are test
/ isolation position and working position in the cabinet, and each position is provided with an interlock device to ensure that the handcart cannot move
casually when it is in the above two positions.

The main technical parameters

Project Unit Parameter
Rated voltage kV 40.5
Lightning impulse withstand voltage (full wave) 185
Rated insulation level kV
Power frequency withstand voltage (1min) 95

Rated frequency Hz 50
Rated current A 630；1250；1600；2000
Rated short circuit breaking (1min)Power frequency kV 20、25、31.5
time
Rated short-circuit closing current (peak) kA 50、63、80
Rated dynamic current (peak) kA 50、63、80
4s Thermal Steady Current (RMS) kA 20、25、31.5

Enclosure rating IP4X
Vacuum circuit breaker cabinet
Dimensions (W × D × H) mm 1400×2800×2600
short circuit cabinet

Circuit breaker technical parameters

parameter
Project Unit
ZN85A-40 3AH3 SF1/SF2
Rated voltage kV 40.5
Lightning impulse withstand voltage (full wave) 185
Rated insulation kV
level
Power frequency withstand voltage (1min) 95
Rated frequency Hz 50
Rated current A 1250；1600；2000 630；1250；2500
Rated short-circuit breaking time kA 20、25、31.5 25、31.5

Rated short-circuit closing current (peak) kA 50、63、80 63、80
Rated dynamic current (peak) kA 50、63、80 63、80
4s Thermal Steady Current (RMS) kA 20、25、31.5 25、31.5(3s)
Opening time ms 36~60 ≤ 45
Closing time ms 40~90 ≤ 75
Rated operation sequence Points-0.3S-Score-180S-Score

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