Page 60 - YINGMING POWER(HIGH VOLTAGE)

YINGMING POWER

JN15-24/31.5

INDOOR HIGH VOLTAGE
GROUNDING SWITCH

Overview
JN15-24 / 31.5 indoor high-voltage grounding switch is improved by our company on the basis of JN15 (the installation size is unchanged). Its
performance meets the requirements of GB1985-2004 "AC high-voltage isolating switch and grounding switch" and IEC129, suitable for indoor 24Kv
three-phase AC 50 (60) Hz power system.

Model and meaning Conditions of Use
J N 15 - 24 / 31.5 - □ Ambient air temperature: upper limit + 40 ℃ , lower limit -10 ℃ ;
Altitude: no more than 1000 meters;
Humidity conditions: the average daily relative humidity does not
exceed 95%;
Interphase distance
Rated short-time withstand current (kA) Earthquake intensity: no more than 8 degrees;
Rated voltage (kV) Pollution level: Grade Ⅱ .
Design Number
Indoor
Earthing switch

The main technical parameters

project Unit Parameter
Rated voltage Kv 24
Rated short-time withstand current (thermal stability) KA 31.5
Rated short-circuit holding time S 4

Rated short-circuit making current KA 80
Rated peak withstand current (dynamic stability) KA 80
Rated short-term power frequency withstand voltage 65
Rated insulation Kv Relatively and alternately
level
Rated lightning impulse withstand voltage 95
Mechanical life Times 2000
53