SecuControl ITS 4600 Series, Reference Handbook, Page: 5 / 40

1 Introduction
The ITS / STP Test Block & Plug (4600 Series)
The ITS is a test block for interfacing substation devices (protection relays, fault
recorders, revenue meters, . . . ) to the voltage and current transformers and to other
equipment on the system side of a power grid.
STP is a test plug keyed to a particular configuration of ITS Test Blocks. Once inserted
into the corresponding test block, the STP Test Plug isolates the substation devices
from the system side equipment. Once the test plug is inserted the secondary injection
can be performed.
Key Features
•
Finger-safe test block and test plug increase safety during testing
•
Test plugs are keyed to the corresponding test blocks and help eliminate the
most common human errors during testing - and their sometimes costly conse-
quences
•
Built-in automatic operating sequence prevents spurious breaker operation
•
Extremely low internal resistance ( < 2 m Ω ) helps reduce heat inside cabinets
and panels and decreases the risk of saturation when using 1 A current trans-
formers
•
Available in 7, 10, 14 or 20 pole configurations
•
Facilitates efficient, standardized testing procedures
Applicable Models
Information in this document applies to all 4600-series ITS Test Blocks and STP Test
Plugs manufactured after February 2012.
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