2.2.3. Accessories
A set of accessories adds optional functions to the basic version.
- External neutral, current sensor for protecting the external neutral pole (can only be configured for three-pole circuit-breakers).
- PR030/B allows the protection release to be temporarily energized so as to view its state (via the LEDs) and perform installation.
- BT030-USB allows temporary energizing and communication of the protection release for the purpose of supervising, via a PC,
information like the Trip log and measurements, and for adjusting settings and functions that are not available using the front dip
switches, such as the Thermal Memory.
- PR010/T allows the protection release to be temporarily energized, performance of the protection test and storage of a test report.
- Similarly to BT030-USB, Ekip T&P can be used to temporarily energize and communicate the protection release via PC. Like
PR010/T, it also allows the protection release to be tested, again via PC.
- The HMI030 switchgear display expands the monitoring functions of the protection release by displaying the current measure-
ments of all the phases in real time.
- Flex Interface modules allow the alarm or state signals of the protection release to be associated with configurable electro-
mechanical contacts. In addition, they allow a complete network of several units to be created and can also be connected to
external modules (e.g. HMI030).
- Ekip Connect is a communication software for PCs or tablets. Compatible with numerous ABB devices, it is supplied with
BT030-USB and Ekip T&P modules or is available on the ABB website.
More details are given from page 63 of chapter 4, or in the dedicated manuals.
2.2.4. Compatibility CB
PR331/P can be installed in ABB circuit-breakers of the three-pole, three-pole with external neutral or four-pole type from the
SACE Emax X1 or SACE Tmax T7-T8 series (any size).
The CB model establishes the rated uninterrupted current the circuit-breaker is able to support (lu).
The adjustable protections (L, S, I and G) refer to the In size defined by the interchangeable Rating plug module installed on the
actual protection release.
2.2.5. Standards
PR331/P has been designed to operate in accordance with the following international standards:
- IEC 60947-2 Low voltage apparatus. Circuit-breakers. (T7-T8, X1)
- UL 489 Molded-Case Circuit Breaker, Molded-Case Switches and Circuit-Breaker Enclosures (T7-T8)
- UL 1066 Low Voltage Power Circuit Breaker (X1)
2.2.6. Environmental characteristics
Operating temperature (Standard version) -25 °C ... +70 °C
Storage temperature -40 °C ... +70 °C
Relative humidity 0% ... 98% with condensation
Degree of protection (with PR331/P installed in the circuit-breaker) IP 30
2.2.7. Electrical characteristics
The protection release is energized:
- Directly by the internal current sensors connected to the busbars of each phase. In this case, the release activates with the
circuit-breaker closed and in the presence of a minimum three-phase current value.
- By an external auxiliary power supply. In this case, continuous operation of the unit is guaranteed even with nil current on the
busbars or with the circuit-breaker open. The protection release functions can also be increased using external accessories
HMI030 and Flex Interface.
To improve the supply condition, ABB recommends use of the auxiliary supply source when there are low load current values
and/or distorted signals.
Primary current characteristics Range
Minimum three-phase busbar current >80A
Frequency 50/60 Hz ±10%
Peak factor
2,1 @ 2xIn in conformity to IEC 60947 Annex F
(Consult ABB for a dedicated analysis if there are higher peak factors)
Auxiliary power supply characteristics Range
DC voltage (galvanically separated) 24 Vdc ±20%
Maximum ripple 5%
Inrush current @ 24V ~2 A for 5ms
Rated power @ 24V ~2 W
WARNING: Since the auxiliary voltage needs to be isolated from the ground, “galvanically separated converters”
in accordance with the IEC standard 60950 (UL 1950) or the equivalent IEC 60364-41 and CEI 64-8.
B1751
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