Page 18 - MCCB-XT5

ABB | SACE Tmax XT

4 - Operating features

Introduction Ekip Touch has been developed and certified to function in specific environmental, electrical and
mechanical conditions; full details are available in the Technical catalog (page 4).
The following sections describe the electrical and power supply characteristics that enable Trip unit and
the relative electronic accessories to operate correctly.

Electrical characteristics The Ekip Touch measurement and protection functions described in this document are provided with
primary voltage and current values within the following nominal ranges:
Parameter Operating limits
Primary current (line-to-line) 0,004 ÷ 16 In (1)
Primary voltage (line-to-line) 0 ÷ 690 V AC
Rated frequency 45 ... 55 Hz (with fn= 50 Hz) / 54 ... 66 Hz (with fn= 60 Hz)
Peak factor Complying with standard IEC 60947-2

(1) based on each phase; In si refers to the nominal size defined by the Rating plug installed on the
Trip unit, available in models from 250 A to 400 A for CB with Iu= 400 A and from 250 A to 630 A for
CB with Iu = 630 A

Ekip Touch can self-supply itself directly from the internal current sensors:
Parameter Operating limits
Minimum three-phase turn-on current > 0,2 In

Auxiliary power supply Ekip Touch can be connected to an external auxiliary supply source, which is useful when certain functions
such as communication via Local Bus, recording manual operations, certain measurements and the
datalogger must if available.
The auxiliary supply can be provided by modules from the Ekip Supply range (further details about
operation are given on page 131) or by direct connection to the internal terminal box.
Direct connection must guarantee the following operating conditions:
Parameter Operating limits
Voltage 24 V DC galvanically isolated
Tolerance ±10%
Maximum ripple ±5%
Maximum inrush current @ 24 V 10 A per 5 ms
Maximum rated power @ 24 V 4 W
Insulated with grounding cable (same
Connection cable
characteristics as Belden 3105A/B or higher)

IMPORTANT: if connection is direct, the power supply must be galvanically insulated and
provide the insulation characteristics established by standard IEC 60950 (UL 1950) or
equivalent.

16 | © 2022 ABB | 1SDH002039A1002 - ECN000212994 Trip unit Overview | 4 - Operating features