MKS 651C, Instruction Manual, Page: 38 / 172

Setup Chapter Two: Installation
24
Checking the Fuses and Line Voltage Selector Switch
The 651 unit is shipped with the line voltage set for 115 VAC. If you need to operate the unit
with a 230 VAC line voltage, follow the instructions in this section. Refer Table 5 for
information on the fuse types.
Fuse Information
Power Supply Option Nominal Line Line Voltage Range Fuse Type
Low power 115 VAC 90-132 VAC @50/60 Hz
75 VA (max) 0.63A (T), 250V,
5 x 20 mm
230 VAC 180-264 VAC @50/60 Hz
75 VA (max) 0.315A (T), 250V,
5 x 20 mm
High power 115 VAC 90-132 VAC @48/62 Hz
150 VA (max) 1.25A (T), 250V,
5 x 20 mm
230 VAC 180-264 VAC @48/62 Hz
150 VA (max) 0.63A (T), 250V,
5 x 20 mm
Table 5: Fuse Information
Note
The fuses are IEC rated (where the name plate value is the expected
current carrying rating) and not UL or CSA rated (where the name plate
value is nearly the current blowing rating). Use of UL or CSA rated fuses
will cause unnecessary blowing at high loads.
Appropriate replacement fuses include:
•
Bussmann GDC-T315 mA or equivalent for the 0.315 A fuse
•
Bussmann GDC-T630 mA or equivalent for the 0.63 A fuse
•
Bussmann GDC-T1.25 A or equivalent for the 1.25 A fuse