Telemark Cryogenics 3600 - Transformer Taping

Telemark Cryogenics Microprocessor Based Cryochillers
Page
27
of
63
Revision 1.0.7 October 2018
200
-
230VAC Vac Three
-
Phase
Nominal current
rating[A]
Fuse
Rating [A]
Minimum copper
wire
AWG/mm
2
Cable Type
(recommended)
30 70 8 / 10 H07RN-F 450/750V 4G10
50 100 6 / 16 H07RN-F 450/750V 4G16
60 125 4 / 25 H07RN-F 450/750V 4G25
380
-
444VAC Three
-
Phase
15 30 14 / 2.5 H07RN-F 450/750V 4G2.5
25 45 10 / 6 H07RN-F 450/750V 4G6
30 60 10 / 6 H07RN-F 450/750V 4G6
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.
Table 6. Cryochiller - recommended circuit breaker value and wire size
1
2
3
Part Number
(17-0360-20)
34875
50-60Hz
0V (1)
200V (2
)
230V (3)
Part Number
(17-0360-38)
34882
50-60Hz
0V (1)
380V (2
)
460V (3)
V (3)
34xxx
Fig 12, Transformer Tapings