Page 58 - YINGMING POWER(HIGH VOLTAGE)

YINGMING POWER

JN15-12/31.5

INDOOR HIGH VOLTAGE
GROUNDING SWITCH

Overview
JN15-12 / 31.5 indoor high-voltage grounding switch is a new type of grounding switch with international advanced level developed by our company
according to the prototype design of ES1 type grounding switch. The structure is assembled, and its performance meets the requirements of GB1985-
2004 "AC high-voltage isolating switch and grounding switch" and lEC129, suitable for indoor 3 ~ 12Kv three-phase AC 50 (60) Hz power system: it
has Closing capacity to protect other electrical equipment in the switchgear from damage, can be used with a variety of high-voltage switchgear, as a
grounding protection for high-voltage electrical equipment maintenance.

Model and meaning Conditions of Use
J N 15 - 12 / 31.5 - □ Ambient air temperature: upper limit + 40 ℃ , lower limit -10 ℃ ;
Altitude: no more than 1000 meters;
Interphase distance Humidity conditions: the average daily relative humidity does not
Rated short-time withstand current (KA) exceed 95%, and the average monthly relative humidity does not
Rated voltage (kV) exceed 90%
Design Number Earthquake intensity: no more than 8 degrees;
Indoor Pollution level: Grade Ⅱ .
Earthing switch

The main technical parameters

project Unit Parameter
Rated voltage Kv 12
Rated short-time withstand current (thermal stability) KA 31.5
Rated short-circuit duration S 4

Rated short-circuit making current KA 80
Rated peak withstand current (dynamic stability) KA 80
Rated short-term power frequency withstand voltage 42
Rated insulation level Kv Relatively and alternately
Rated lightning impulse withstand voltage 75
Mechanical life Times 2000
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