TELE HAASE

Voltage Monitoring Relays

Single and three-phase voltage monitoring relays from Telehase — covering phase failure, over/undervoltage, and asymmetry protection across a wide voltage range.

Broad range of SKUs — covers most common application requirements from stock
Compact DIN rail format — easy to integrate into new or existing panels
1 or 2 changeover outputs — flexible for different panel and control circuit needs
Phase failure detection across the full range — protects motors and equipment from costly damage
Wide voltage coverage — 24V DC to 480V AC, single and three-phase

Selected variant

Save as pdf

Accessories & Related products

Selected variant

Specifications

Product description

Telehase voltage monitoring relays provide reliable phase and supply protection for both single and three-phase systems. The range covers phase failure detection, overvoltage and undervoltage monitoring, and asymmetry protection — with 1 or 2 changeover output options to suit varying panel configurations. Voltage ranges span standard 230V single phase through to 480V three-phase, making the range suitable for a wide variety of industrial and commercial installations across Ireland and the UK.

Accessories

Blog

Katko IsoSafe KSM Safety Switch

Katko has launched a significant upgrade to its IsoSafe KSM safety switch range (16–25A), built around the realities of modern installation work. The redesigned side-operated switch combines an

Blog

Wohner 60 Classic and Crossboard

Modular busbar systems that streamline power distribution, improve safety, and speed up panel builds.

Blog

Tekox Terminal Strips Safety Blocks and Porcelain Blocks

Great electrical installations don't fail because of the major components. They fail because of the small ones that didn't get enough attention.
It's easy to focus on the big-ticket items during specification — and let the terminal blocks become an afterthought. But inferior connection components have a habit of making themselves known over time. Loose connections, degraded insulation, premature failure. The kind of faults that are frustrating to trace and expensive to fix.
Tekox engineer their terminal strips, safety blocks, insulated strips, and porcelain blocks to the standards your installations deserve. Available now from Demesne Electrical — get in touch and we'll show you the range.

Blog

Conta-Clip Push-in PPVK Distribution Terminals

Conta-Clip PPVK push-in potential distribution terminals simplify control cabinet wiring with tool-free connections, compact DIN rail mounting, and reliable current distribution up to 41A.

Blog

Electrical Protection in Energy Storage Systems (ESS): Keys to a Safe Installation

The PMX fuse holder range is compact, halogen-free, and manufactured in Europe for fast availability. Available in 10×38, 14×51, and 22×58 sizes with IEC, UL, and CSA approvals, they feature silver-plated contacts, IP20 touch-safe design, and optional blown fuse indicators — giving panel builders reliable, safe, and flexible protection.

Company News

Wayne Moody Joins OEM | Demesne Electrical

We’re excited to share some great news at Demesne Electrical. Wayne Moody has joined our team, bringing with him years of experience and a clear vision for the future. His focus will be on building on our strong reputation here in Ireland and driving our growth across Europe.

My favourites	Articles	Price
	Voltage Monitor 3 Ph 1 C/O Phase Failure Art: E1PF400VSY01 Copied
	Voltage Monitor 1/3 Ph Phase Failure Art: E1YM400VS10 Copied
	Time Relay Load Alternator 5 functions Art: E1ZMLA10 24-240VAC/DC Copied
	Monitoring Relay Level Control 115v AC Art: G2LM20115VAC Copied
	Voltage Monitor 3 Ph. Phase Sequence Fai Art: G2PF400VS02 Copied
	Voltage Monitor 3 Ph Phase Rotation/Asymmetry Art: G2PM400VSY2024-240V Copied
	Voltage Monitor 1/3 Ph Multi Function 2 Art: K3YM400VSY20 Copied
	VOLTAGE MONITORING 480V PHASE FAILURE Art: E1YM480Y277VS10 Copied
	Voltage Monitor 3 Ph 2 C/O Phase Failure Art: E3PF400VSY02 Copied
	Voltage Monitor 1+3 Ph 2 C/O Ph Failure Art: E3YM230VS20 Copied
	Voltage Monitor 3 Ph 2 C/O Phase Failure Art: E3YM400VSY20 Copied
	Voltage Monitor 3 Ph 2 C/O Phase Failure Art: G2PM400VSY2024-240 Copied
	Voltage Monitor 1 Ph 2 C/O 24-240VAC/DC Art: G2UM300VL20 Copied
	Voltage Monitor 1 Phase 2 C/O 11pin Art: K3UM230VAC02 Copied