Schneider Electric DPER32 Easy TeSys Thermal Overload Relay - Reliable

In this review of the Schneider Electric DPER32 Easy TeSys thermal overload relay, the bottom line is simple: it is a compact, reliable protection device for 3-phase motors used in HVAC, compressors and pumps. The reviewer found the unit particularly useful where space is limited and predictable thermal protection is required, with a clear thermal adjustment dial, phase-break detection and both manual and automatic reset options. For technicians and facility managers who need a durable, standards-certified overload relay with clear trip indication and screw clamp terminals, this is an efficient, no-nonsense choice.

Key Features

• Thermal protection: Provides adjustable thermal overload protection for 3-phase motors from 23-32A, helping prevent motor damage from sustained overloads.
• Phase-break and unbalance detection: Built-in differential device detects phase failure and load unbalance, improving reliability for HVAC and compressor applications.
• Manual/automatic reset: Selector allows technicians to choose manual or automatic reset to suit maintenance practices and safety requirements.
• Clear controls and indicators: Includes a test selector, stop and reset buttons plus a flag trip indicator and auxiliary contacts for fault signalling.
• Compact, modular design: Space-saving form factor and DIN rail or screw mounting make it easy to install in tight control panels or separated from a contactor.
• Multi-standard certified: Rated to IEC and cUL standards with 600V cUL / 690V IEC insulation ratings for broad compatibility.

Who It's For

This relay is aimed at electricians, HVAC technicians and maintenance teams who need dependable thermal overload protection for 3-phase motors up to 15kW@400V. It is a practical choice for installations in air conditioners, heat pumps, compressors, pumps and industrial fans where clear trip feedback and phase protection are important.

Those who should look elsewhere include users who require electronic ground-fault detection, communications-enabled motor protection, or integrated soft-start features; the DPER32 is a thermal relay focused on mechanical simplicity and proven thermal trip behavior rather than advanced electronic diagnostics.

Pros & Cons

Pros

• Reliable thermal overload protection with an easy-to-set thermal adjustment dial for 23-32A ranges.
• Phase failure and unbalance detection adds an extra layer of motor safety in three-phase systems.
• Compact and modular design fits space-constrained panels and mounts on DIN rail or by screw fixing.
• Clear trip indication, test function and 1NO+1NC auxiliary contacts make diagnostics and signalling straightforward.

Cons

• Does not provide the advanced electronic features or remote communications that some modern motor protectors offer.
• Thermal-based tripping can be slower to react than electronic instantaneous protection for some fault types.

Specifications

Model	DPER32 Easy TeSys
Thermal setting range	23-32 A
Rated insulation	600V cUL / 690V IEC
Tripping class	Class 10
Motor protection	For 3-phase motors up to 15 kW @ 400V
Contacts	2 auxiliary contacts 1NO + 1NC for fault signalling
Connection	Screw clamp terminals; DIN rail or screw mounting

Our Verdict

The Schneider Electric DPER32 Easy TeSys thermal overload relay is a solid, cost-effective choice for technicians who need dependable thermal protection and phase-break detection in HVAC and compressor installations. Its compact form, clear controls and standards certifications make it good value for routine motor protection where electronic communication or advanced diagnostics are not required.

Frequently Asked Questions

Can this relay detect a single phase failure?
Yes, the DPER32 includes differential phase-break protection and unbalance detection to identify phase failures.

How is the unit mounted and connected?
The relay connects using screw clamp terminals and can be mounted on DIN rail or fixed with screws; it can also couple to compatible DPE contactors.

Does it have reset and test functions?
Yes, it offers a manual-automatic reset selector, a test selector to simulate tripping, and reset and stop buttons for local control.