lightning-resistant transformer/ST type

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Product Details

Specification Parameters

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The lightning-resistant transformer is used for surge protection of power supply department of low-voltage distribution wire equipment such as equipment room, wireless relay station and mobile phone base station.

It consists of a high-voltage insulated transformer with electrostatic shielding (ground protection) and a power supply SPD (line protection), which is used to exclude abnormal voltages caused by induced lightning surges and geopotential rise.

Appearance drawing

N`29K`XG4UUU[C4M`_DRGL

Circuit diagram

Model identification

Note 1: Non-standard capacity products can also be made.

Note 2: Can also make insulation type H products.

※ Example of AC withstand voltage symbol 1.

Item			Property				Remark
Input output voltage			AC100V、AC200V、AC400V、AC100/200V
Type of connecting line			Single-phase(2-wire,3-wire),three-phase 3-wire(Delta connection)
capacity		monophase	0.5～30kVA				Note 1
		Three phase	1～75kVA
Frequency of use			50Hz／60Hz
Insulation resistance			DC500M时100MΩ以上
Withstand voltage	Between input and output		AC10kV（1min） strike （1.2/50μs）30kV
	Between input and ground cable
	Between input and ground cable		AC3kV（1min）
Voltage variation rate and efficiency	monophase	capacity	0.5kVA below	1～2kVA	3kVA	5kVA以上
		Electrical voltage change rate	5％ below	4％below	3％below
		efficiency	93％ above		95％ above
	Three phase	capacity	7.5kVAbelow		10kVA above
		Electrical voltage change rate	3％below		2％below
		efficiency	95％ above		97％ above
Type of insulation		monophase	Class A below 2kVA, Class B above 3kVA				Note 2
		Three phase	Class A below 60kVA, Class B above 75kVA
Temperature rise limit		A class	55℃ below				The ambient temperature is 40℃ Measurement by electric resistance method
		B class	75℃ below
Surge transfer rate			1/1,000 below

Size / Mass (single phase)

Note: The size of non-standard type may differ from this size.

capacity	Size（mm）							Mass(KG)
（kVA）	A	B	a	b	H	H0	D	Mass(KG)
0.5	200	200	150	185	200	70	8.5	13
1	200	250	150	230	200	70	8.5	18
2	240	290	150	270	260	70	8.5	31
3	240	290	150	270	260	70	8.5	35
5	260	380	200	360	380	90	10.5	47
7.5	260	380	200	360	380	90	10.5	65
10	320	400	250	380	420	100	10.5	96
15	320	400	250	380	420	100	10.5	120
20	400	500	300	470	420	110	12.5	160
25	400	500	300	470	500	110	12.5	177
30	400	500	300	470	500	150	12.5	200

Size / Mass (three-phase)

Note: The size of non-standard type may differ from this size.

capacity	Size（mm）								Mass(KG)
（kVA）	A	B	a	b	H	H1	H2	D	Mass(KG)
1	350	480	250	440	350	90	45	12	45
2	350	480	250	440	350	90	45	12	55
3	350	480	250	440	350	90	45	12	65
4	400	580	300	540	400	90	45	12	80
5	400	580	300	540	400	90	45	12	90
7.5	400	630	300	590	470	100	50	12	135
10	400	630	300	590	470	100	50	12	155
15	400	630	300	590	540	100	50	12	195
20	400	630	300	590	540	100	50	12	220
25	460	740	300	690	620	110	55	16	300
30	460	740	300	690	620	110	55	16	325
35	500	830	300	780	690	110	55	16	370
50	500	830	300	780	690	110	55	16	430
75	580	910	400	850	720	150	55	19	580