Surge Isolation Transformer TT series

TT series

Shielded lightning protection transformers

Features

・Attenuates ingress surges from the primary (input power) side (10,000V to 100V) or less.
・Impulse withstand voltage of 30kV
・The transparent cover on the front allows easy inspection of the SPD.

Type

Specification

Item	Conditions	Performances
Item	Conditions	Single-phase 2-wire, Single-phase 3-wire	Three-phase 3-wire
Regulation	0.5kVA	Less than 6%	-
	1～2kVA	Less than 5%	-
	3kVA	Less than 4%	Less than 5%
	5kVA	Less than 3%	Less than 4%
	More than 7.5kVA	Less than 3%	Less than 3%
Efficiency	0.5kVA	More than 90%	-
	1～2kVA	More than 92%	-
	3kVA	More than 94%	More than 94%
	More than 5kVA	More than 95%	More than 95%
Insulation resistance test	Primary to Secondary (DC 500V meter)	More than 100MΩ
Withstand voltage	Primary to Secondary	AC10kV(1 minute) Power frequency withstand voltage Impulse withstand voltage30kV（1.2/50μs）
	Primary to Earth
	econdary to Earth	AC3kV(1 minute)
Temperature rise	Resistance method	not exceeding 120deg
Surge-Attenuation	Common mode	Line to earth less than 1／100 (－40dB)
Class of insulation	-	H
Transformer Type	-	Dry type natural air cooled
Operating conditions	Frequency	0Hz or 60 Hz
	Ambient temperature	－20℃～＋40℃
	Humidity	Not exceeding 90％
	Altitude	Not exceeding 1,000m
	Place of use	Indoor-use

Specifications

Phase	Item	Specifications
Single-phase 2-wire	Primary Voltage	AC　100V※
	Secondary Voltage	AC　100V※
	Rated Capacity	0.5～20kVA
Single-phase 3-wire	Primary Voltage	100V×2※
	Secondary Voltage	100V×2※
	Rated Capacity	3～50kVA
Three-phase 3-wire	Primary Voltage	200V※
	Secondary Voltage	200V※
	Rated Capacity	3～50kVA

※The voltage can be 110, 115, 220, 240, 420, 440V.

Dimensional Outline Drawing

Phase	Type	Capacity	Dimensions　(mm)								Approximate weight	Figure
Phase	Type	Capacity	a	b	c	d	e	f	g	h	Approximate weight	Figure
Single-phase 2-wire	TT1 0.5-□・□	0.5kVA	300	350	400	100	340	200	370	11	25kg	A
	TT1 1-□・□	1kVA	300	350	400	100	340	200	370	11	30kg	A
	TT1 2-□・□	2kVA	300	350	400	100	340	200	370	11	35kg	A
	TT1 3-□・□	3kVA	300	350	400	100	340	200	370	11	50kg	A
	TT1 5-□・□	5kVA	400	400	500	100	370	200	400	11	65kg	B
	TT1 7.5-□・□	7.5kVA	400	400	500	100	370	200	400	11	85kg	B
	TT1 10-□・□	10kVA	400	400	500	100	370	200	400	11	100kg	B
	TT1 15-□・□	15kVA	500	500	550	100	470	250	500	13	125kg	B
	TT1 20-□・□	20kVA	500	500	550	100	470	250	500	13	150kg	B
	TT1 30-□・□	30kVA	600	600	650	100	570	300	600	13	210kg	B
Single-phase 3-wire	TT2 3-□・□	3kVA	300	350	400	100	340	200	370	11	50kg	A
	TT2 5-□・□	5kVA	400	400	500	100	370	200	400	11	65kg	B
	TT2 7.5-□・□	7.5kVA	400	400	500	100	370	200	400	11	90kg	B
	TT2 10-□・□	10kVA	400	400	500	100	370	200	400	11	100kg	B
	TT2 15-□・□	15kVA	500	500	550	100	470	250	500	13	125kg	B
	TT2 20-□・□	20kVA	500	500	550	100	470	250	500	13	150kg	B
	TT2 30-□・□	30kVA	600	600	650	100	570	300	600	13	210kg	B
	TT2 35-□・□	35kVA	600	600	650	100	570	300	600	13	215kg	B
	TT2 50-□・□	50kVA	700	700	750	100	660	300	700	17	310kg	B
Three-phase 3-wire	TT3 3-□・□	3kVA	300	350	400	100	340	200	370	11	50kg	A
	TT3 5-□・□	5kVA	400	400	500	100	370	200	400	11	70kg	B
	TT3 7.5-□・□	7.5kVA	400	400	500	100	370	200	400	11	90kg	B
	TT3 10-□・□	10kVA	500	500	550	100	470	250	500	13	115kg	B
	TT3 15-□・□	15kVA	500	500	550	100	470	250	500	13	130kg	B
	TT3 20-□・□	20kVA	500	500	550	100	470	250	500	13	150kg	B
	TT3 30-□・□	30kVA	600	600	650	100	570	300	600	13	190kg	B
	TT3 50-□・□	50kVA	700	700	750	100	660	300	700	17	310kg	B
	TT3 75-□・□	75kVA	700	700	750	100	660	300	700	17	410kg	B

Caution
1.Paint color (Munsell symbol) is 5Y7/1 semi-gloss.
2.Primary, secondary, and grounding cable drawers are located on the lower front side.
3.The front panel can be removed by screwing in four places.

Purpose

Protects equipment from lightning surges entering from the power supply and ground.
Isolated Lightning Transformer (Lightning Tr).
Lightning resistant transformer.

Dimension drawing