2-2 T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION
2
and PTP (according to IEEE Std. 1588-2008 or IEC 61588), and it allows access to the relay via any standard web browser
(T35 web pages). The IEC 60870-5-104 protocol is supported on the Ethernet port. The Ethernet port also supports the
Parallel Redundancy Protocol (PRP) of IEC 62439-3 (clause 4, 2012) when purchased as an option.
Secure Routable GOOSE (R-GOOSE) is supported with software options.
Settings and actual values can be accessed from the front panel or EnerVista software.
The T35 uses flash memory technology that allows field upgrading as new features are added. Firmware and software are
upgradable.
The following single-line diagram illustrates the relay functionality using American National Standards Institute (ANSI)
device numbers.
Table 2-1: ANSI device numbers and functions supported
Figure 2-1: Single-line diagram
Device
number
Function
49 Thermal Overload Protection
50/87 Instantaneous Differential Overcurrent
50G Ground Instantaneous Overcurrent
50P Phase Instantaneous Overcurrent
51G Ground Time Overcurrent
51P Phase Time Overcurrent
81U Underfrequency
87RGF Restricted Ground Fault
87T Transformer Differential
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