Transformer Taping - Telemark Cryogenics 1200 Instruction Manual

Nominal current Fuse
rating[A] Rating [A]
30
50
60
15
25
30
Table 6. Cryochiller - recommended circuit breaker value and wire size
2.7.4 Transformer Connections
The units are manufactured as either "High Voltage" (HV) 380-420
VAC 3 phase 50/60Hz or 460VAC 60Hz or "Low Voltage" (LV), 208-
230VAC 3Phase 50/60Hz.
The voltage the unit is allocated at time of manufactured to must be
determined at time of order. Once ordered, the unit cannot be
changed to operate using a different voltage.
A transformer is fitted to the unit to drop down the incoming voltage to
24VAC and 110VAC. It may be required that the voltage tapings on
the transformer may have to be altered to suit the incoming mains
voltage. For example, if the incoming voltage is 180VAC across two
phases, the line side of the transformer need to be connected to pin 2
of the transformer. If the incoming voltage is 230VAC across two
phases then the connection to pin 3 is required.
Illustration below gives details of the transformer connections.
Part Number
(17-0360-20)
34875
0V (1)
50-60Hz
)
200V (2
230V (3)
Telemark Cryogenics Microprocessor Based Cryochillers
200-230VAC Vac Three-Phase
Minimum copper
wire
AWG/mm
70 8 / 10
100 6 / 16
125 4 / 25
380-444VAC Three-Phase
30 14 / 2.5
45 10 / 6
60 10 / 6
1
2
3
Fig 12, Transformer Tapings
Page 27 of 63
Cable Type
(recommended)
2
H07RN-F 450/750V 4G10
H07RN-F 450/750V 4G16
H07RN-F 450/750V 4G25
H07RN-F 450/750V 4G2.5
H07RN-F 450/750V 4G6
H07RN-F 450/750V 4G6
Revision 1.0.7 October 2018
Part Number
(17-0360-38)
34882
0V (1)
50-60Hz
)
380V (2
460V (3)
V (3)