Siemens SIPROTEC 5 Series Hardware Description page 184

Working on the Device
5.7 Installing Current and Voltage Terminals
Current-Terminal Block for Non-Modular Devices (7xx82)
The following transformers can be installed optionally in a current-terminal block for non-modular devices:
•
4 protection-class current transformers
•
3 protection-class current transformers and 1 instrument transformer
Protection-class current transformers on non-modular devices are transformers with a rated current of 1 A or
5 A and a measuring range of 50 x rated current.
Instrument transformers are transformers with a rated current of 1 A or 5 A and a measuring range of
1.6 x rated current. Instrument transformers are also referred to as sensitive protection-class current trans-
formers or sensitive ground-current transformers.
NOTE
i
i
You can read the type of the current transformer used on the side of the terminal block:
•
C73334A 1A18 *5* = 4 protection-class current transformers
•
C73334A 1A18 *6* = 3 protection-class current transformers and 1 instrument transformer
Use the cross connector for voltage terminals shown on the right in the figure below for grouping binary
inputs and relay outputs.
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Figure 5-24
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Figure 5-25
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Figure 5-26
Cover caps for sealing the contacts of the terminal block can be ordered as accessories.
184
Cross Connector for Current (Left) and Voltage Terminals (Right)
Covering Cap for Current-Terminal Block
Covering Cap for Voltage-Terminal Block
SIPROTEC 5, Hardware Description, Manual
C53000-G5040-C002-C, Edition 10.2017