TGXR6-40.5KV SF6 Ring Main Unit

TGXR6-40.5 series ring main unit is a complete set of power distribution device for 40.5kV three-phase AC 50Hz single busbar and single busbar sectional system, primarily suitable for power transmission in power generation companies and small and medium-sized generators, power distribution in industrial and mining enterprises, power receiving and power transmission in power system substations, and startup of large-scale high-voltage motor for control, protection, and monitoring.

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Catalog

TGXR6-40.5.pdf

Certificate

Overview

TGXR6-40.5KV SF6 Ring Main Unit Technical Parameters

No.	Name			Unit	Parameter
1	Rated voltage			kV	40.5
2	Rated current			A	1250, 2500
3	Rated freq.			Hz	50
4	Rated short-time withstand current			kA	25(21.8), 31.5(27.4)
5	Rated peak withstand current			kA	63(54.8), 80 (69.6)
6	Rated short-circuit current duration			s	4
7	Rated short-circuit breaking current			kA	25, 31.5
8	Rated short-circuit making current			kA	63, 80
9	Arcing duration			s	1
10	Mechanical life		Circuit breaker	Times	10000
			Isolating switch		3000
			Grounding switch		3000
11	Electrical life of circuit breaker			Times	30 times
12	Rated charge pressure (gauge pressure at 20℃)			MPa	0.02
13	Min. functional pressure (gauge pressure at 20℃)			0
14	Annual leakage rate of SF6 gas			-	≤0.01%
15	Rated insulation level	Rated power frequency 1min withstand voltage (effective value)	Phase-to-phase, phase-to-ground	kV	95
			Isolation fracture, vacuum fracture	kV	118
		Rated lightning impulse withstand voltage peak (peak)	Phase-to-phase, phase-to-ground	kV	185
		Rated lightning impulse withstand voltage peak (peak)	Isolation fracture, vacuum fracture	kV	215
16	Aux. control circuit		Rated voltage	V	DC:110, 220 AC:110, 220
16	Aux. control circuit		1min power frequency withstand voltage	V	2000
17	Protection grade		Housing	-	IP41
17	Protection grade		Gas chamber	-	IP67
18	Operation loss continuity category			-	LSC2B
19	Temperature rise test			A	1.1Ir
20	Loop resistance		1250A		≤120
20	Loop resistance		2500A		≤80
21	Partial discharge		Test voltage	kV	1.1×40.5
			Single insulator	pC	≤3
			Machine	pC	≤20
22	Service life			Year	≥30
Notes: a) The rated peak withstand current parameters and rated short-time withstand current of the current transformer are evaluated separately; b) The loop resistance refers to the measured resistance from the outgoing line of the busbar tie breaker socket (including busbar tie breaker) to the outgoing line of the cable socket (including the current device), with 20 subtracted when there are no busbar tie breaker and current device. c) The value in parentheses is the parameter value of the grounded circui