ALO Plug-On CT Series

The series with integrated short-circuit bridge

Compact current transformers for DIN rail – safe and easy to install

• ✓Integrated short-circuit bridge as standard
• ✓Quick DIN rail mounting
• ✓Primary currents from 50/5 A to 4000/5 A

CEL-NA-S Grid Protection Relay

Grid and system protection relay acc. to VDE-AR-N 4105/4110/4120

Standard-compliant monitoring of voltage, frequency, ROCOF/vector shift and phase sequence

• ✓3 potential-free changeover relays for coupler switch control
• ✓Digital inputs for feedback and remote disconnection
• ✓Optional Modbus RTU interface for extended communication
• ✓Voltage range 3×100–690 V AC, 50/60 Hz

Applications: PV systems, CHP, storage, wind and hydropower

KALO Split-Core CT

Split-core current transformer with integrated short-circuit bridge

Quick retrofit on existing busbars and cables – without power interruption

• ✓Easy installation with hinged housing design
• ✓Integrated short-circuit bridge for safe transformer replacement
• ✓Primary currents from 100/5 A to 3000/5 A
• ✓Accuracy class 0.5 – suitable for billing purposes

Ideal for: Switchgear retrofit, utilities, industrial plants

RALO Rogowski Coil

Flexible current measurement for high currents – without iron core

Lighter, more compact and flexible than conventional current transformers

• ✓Linear measuring range without saturation effects
• ✓Flexible and lightweight – ideal for confined spaces
• ✓Measuring range up to 10,000 A and beyond
• ✓Open design for easy retrofit installation

Ideal for: High-current applications, energy monitoring, switchgear

ALO Plug-On CT Series

Compact current transformer series with short-circuit bridge

Space-saving on DIN rail – class 0.5 and 1 for metering and protection

• ✓Compact design for space-saving DIN rail mounting
• ✓Integrated short-circuit bridge as standard
• ✓Primary currents from 50/5 A to 4000/5 A
• ✓Various sizes for every requirement

Ideal for: Switchgear, power distribution, industrial plants