3 PRODUCT SCOPE
The MiCOM P64x range of devices preserve transformer service life by offering fast protection for transformer
faults. Hosted on an adv
anced IED platform, the P64x products incorporate Current Differential, Restricted Earth
Fault (REF),Thermal, and Overfluxing protection, plus backup protection for uncleared external faults. Further, the
P64x devices provide a range of transformer condition monitoring functions such as Through-fault monitoring,
loss of life statistics, RTD and CLIO protection functionality.
All devices also provide a comprehensive range of additional features to aid with power system diagnosis and fault
analysis.
Model variants cover two and three winding power transformers, with up to five sets of 3-phase CT inputs. Backup
overcurrent protection can be directionalised, if you select the optional 3-phase VT input.
The P64x range consists of three models; the P642, P643, and P645.
● The P642 provides 8 on-board CTs to support two-winding 3-phase power transformers and 1or 2 single-
phase voltage transformers to support directionalisation and a range of voltage-related functions.
● The P643 provides 12 on-board CTs to support three-winding 3-phase power transformers, a single-phase
voltage transformer and an optional three-phase voltage transformer to support directionalisation and a
range of voltage-related functions including undervoltage, overvoltage and residual overvoltage protection.
● The P645 provides 18 on-board CTs to support three-winding 3-phase power transformers and other
applications needing 5 sets of 3-phase current inputs, a single-phase voltage transformer and an optional
three-phase voltage transformer to support directionalisation and a range of voltage-related functions
including undervoltage, overvoltage and residual overvoltage protection.
The difference in model variants are summarised below:
Feature/Variant P642 P643 P645
Case 40TE 60TE/80TE 60TE/80TE
Number of CT Inputs 8 (6 Bias, 2 EF) 12 (9 bias, 3EF) 18 (15 Bias, 3EF)
Number of VT inputs 1 or 2 1 or 4 1 or 4
Number of bias inputs (3-phase CT sets) 2 3 5
Optically coupled digital inputs 8 - 12 16 - 40 16 - 40
Standard relay output contacts 8 - 12 8 - 24 8 - 24
Function keys No 10 10
Undervoltage/Overvoltage/Residual voltage protection No Yes Yes
Underfrequency/Overfrequency protection No Yes Yes
Overfluxing protection 1-phase only 1-phase + 3-phase 1-phase + 3-phase
Programmable LEDs 8 red 18 tri-colour 18 tri-colour
3.1 PRODUCT VERSIONS
Since software version 2, the evolution of the P64x product family has followed two paths as shown below:
Chapter 1 - Introduction P64x
6 P64x-TM-EN-1.3
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