5 Operation Elements Field Case
5.1 Front Panel Overview
5.2 Control Elements and Plugs
5.2.1 Fuse, Mains Input and Mains Switch
A 2A fuse (slow blow) protects the device. Use only the correct fuse type to replace it.
5.2.2 Ground Terminal
Use this terminal to connect an additional ground line, if your mains cable does not provide a
ground line. Use it also if you are not sure, that the local installation provides a low resistive
ground.
90100-2.20 Instruction Manual TR-MARK III 250V
Page 15 of 68
4: High Voltage Side
Connector
5: Low Voltage Side
Connector
7: External
(Tap Changer)
6: 3 Phase
Extension
(T-REX)
8: Interface
(USB and RS232)
11: Thermal Printer
10: Display and
Touch Panel
9: Safety Indicator
3: Emergency Stop
1: Fuse, Mains Input and
Mains Switch
2: Ground Terminal