General Features; Versions; Description; Applications - LEGRAND 261 93 Mode D'emploi

1. General features

1.1 Versions

• 261 93 - Standard version

1.2 Description

• Electronic Control Box - microprocessor
• Two inputs of three-phase voltage measurement
• Power supply DC 12-24-48 VDC
• Power supply AC 220-240 VAC
• 2 LED displays, 3 digits 7 segments
• 20 status and measurement LED indicators

1.3 Applications

• Changeover between utility-to-utility, utility-to-
generator
• Control of motorized circuit breakers, motorized
switches
• Start/stop generator
• Three-phase, two-phase or single-phase voltage
controls

1.4 Installation

• Install the electronic control box according to the
wiring diagrams shown in the last pages of the
manual
• Use the right wiring diagram for the application

1.5 Supply

• 261 93 and 261 94 have a double power sup-
ply circuit, that means that they can operate with
both AC and DC supply or with only one of the
two indifferently
4
• 261 94 - Evoluted version + interface RS-485
• 8-key membrane keypad
• RS-232 serial interface for set-up, remote control
and supervision
• RS-485 opto-isolated interface for MODBUS pro-
tocol (261 94)
• 2 programmable digital inputs
• 3 programmable relay outputs (1NO + 2 C/O)
• L-L voltage (or L-N voltage in case of monophase
lines)
• Controls on minimum voltage, maximum voltage,
phase loss, asymmetry, minimum frequency, max-
imum frequency, with independent enabling and
delay
• Voltage thresholds with programmable hysteresis
• Set the parameters according to the required
wiring diagram, paying special attention when
programming the inputs / outputs
• In presence of both power supplies, the energy is
taken from the AC source