Lake Shore Model 642 Electromagnet Power Supply User’s Manual
Installation
3-3
1
2
3
12
8
7
6
10
15
9
14
13
15
11
5
4
Figure 3-1. Model 642 Rear Panel (shown with wiring cover removed)
3.3
POWER WIRING AND SET-UP
This section describes how to properly connect the Model 642 to the line power. Please follow these instructions
carefully to ensure proper operation of the instrument and the safety of operators.
3.3.1 Line
Voltage
Selection
The Model 642 has four AC line voltage configurations covering seven different input voltages. The nominal voltage and
voltage tap setting as well as the circuit breaker current setting for each configuration is shown in Table 3-2. Verify that
the unit is configured correctly for the voltage being applied to the unit before applying power.
Table 3-2. Voltage and Current Selection
Nominal
Voltage
Voltage
Tap
Circuit
Breaker
200 V
204 V
18 A
208 V
204 V
18 A
220 V
225 V
17 A
230 V
225 V
17 A
380 V
380 V
12 A
400 V
408 V
12 A
415 V
408 V
12 A
