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Emax UL
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Doc. N°
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RH0109002
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15. SACE PR113/P-A Trip unit – Identification
The PR113 units available according to the ANSI/UL Standards are:
•
PR113/P-A (LSIG)
•
PR113/PD-A (LSIG fitted with communication card).
15.1 Standard
The PR113 /P-A has been designed to work in accordance with the following international standard :
Low voltage AC and DC power circuit breakers used in enclosures ANSI/UL 1066.
15.2 Specifications
15.2.1 General
The PR113 unit is a self-supplied protection unit with high performance with Protection, Measurement, Watchdog, Signaling, Test, Control
of the Power circuit breaker, Communication and Storage functions for ABB SACE ‘EMAX’ series of air three-pole and four-pole Low Voltage
power circuit breakers
The protections available are:
Symbol
Protection against …
L
overload with inverse long time-delay
S
short circuit with adjustable delay
D
directional short circuit with adjustable delay
I
instantaneous short circuit
G
ground fault with adjustable delay
U
phase unbalance
O T
temperature out of range
K
load control
UV
undervoltage
OV
overvoltage
RV
residual voltage
RP
reverse active power
Iinst
ultra rapid instantaneous short circuit (for high currents)
The PR113 can be installed both on three-pole, three-pole with external neutral or four-pole power circuit breakers.
It should be noted that the reference current, for the PR113, is the In (continuous current rating of the CTs mounted in the power circuit breaker)
and not the Iu (uninterrupted continuous current rating of the power circuit breaker itself).
Example: the E1B-A800 power circuit breaker with 250 A CT, has an Iu of 800A and an In of 250 A.
The unit carries out opening of the power circuit breaker, in which it is integrated, by means of the SA, which acts directly on the mechanical lever
mechanism of the apparatus.
The CTs supply the trip unit with both the energy for self-supply, and the signal to calculate the current circulating in the busbars of the power
circuit breaker. Operation in self-supply is guaranteed for any protection function and for setting which can be defined by the user. Some
supplementary functions, for example the SdZ, require an external auxiliary power supply.
For further information regarding self-supply and the auxiliary power supply, see par. 15.2.2.
The VTs provide the signals used for the protection functions and for the measurements of voltage and power (see par. 15.3.2).
The maximum length of the VT - PR113 cabling must not exceed 15 meters.
Use corded shielded two-wire cable (see note A to par. 11.2.2).
The shield must be connected to ground on both sides.
Use VTs with a shield, connected to ground (see note A to par. 15.3.2.1).
The unit is made with electronic digital technology and interfaces with the user with a graphic display and a membrane control keyboard.
The protection parameters and in general the mode of operation of the unit are fully programmable by the user, in different languages.