SCHIELE DL22N-22 22 kW Contactor

Description

Key Technical Specifications

The SCHIELE/Entrelec technical documentation identifies the DL N family as contactors for three-phase motor and AC-load switching. It specifies AC-3 applications for squirrel-cage motors and gives a 22 kW motor example for the DL 22 N size.

The exact -22 configuration is also documented in market listings as a 24 VAC, 60 Hz, 3-pole contactor with 2 NO auxiliary contacts; therefore, the coil voltage should be checked against the nameplate before replacing an installed unit.

Product Introduction

The SCHIELE DL22N-22 is an electromechanical three-phase power contactor intended for switching motors and other AC loads. The DL 22 N frame is rated for motor applications up to 22 kW at 400 V AC under AC-3 duty, with the -22 version commonly identified with a 24 VAC, 60 Hz coil and 2 NO auxiliary contacts.

Its application value is straightforward: it provides electrically controlled switching between an automation system and a higher-power AC load. The contactor supports auxiliary feedback/control circuits and is designed for industrial motor-starting applications. The manufacturer documentation specifies forced contact opening, defined switching characteristics, and mechanical life up to 10 million operations for the applicable contactor family.

DL22N-22

DL22N-22

Installation & Configuration Guide

Stage 1 — Pre-Installation Preparation

1. Confirm that the replacement is DL22N-22, not another DL N frame or a different coil-voltage variant.
2. Verify the coil marking. The -22 configuration is commonly listed as 24 VAC, 60 Hz; do not energize the coil until the installed unit’s nameplate has been checked.
3. Isolate the incoming power and apply the site’s lockout/tagout procedure.
4. Verify absence of voltage with a properly rated meter.
5. Record existing wiring, auxiliary-contact usage, and terminal designations before removal.
6. Prepare insulated screwdrivers, a torque-controlled driver, multimeter, and appropriate PPE.
7. Confirm that the motor protection device and upstream short-circuit protection are correctly sized for the actual motor and application.

Stage 2 — Removing the Existing Contactor

1. De-energize both the main power circuit and the contactor control circuit.
2. Verify zero voltage at the main and coil terminals.
3. Photograph the existing terminal arrangement before disconnecting conductors.
4. Label line, load, coil, and auxiliary-contact conductors.
5. Remove the power and auxiliary wiring without disturbing adjacent devices.
6. Release the contactor from its mounting arrangement.
7. Inspect the mounting surface and conductors for heat damage, loose hardware, discoloration, or insulation deterioration.

Stage 3 — Installing the DL22N-22

1. Verify the replacement nameplate and contact configuration before installation.
2. Mount the contactor in the manufacturer’s specified orientation; the technical documentation specifies a vertical mounting plane with ±22.5° tolerance.
3. Connect the three-phase supply and motor conductors to the corresponding main terminals.
4. Reconnect the coil circuit only after confirming the actual coil voltage.
5. Reconnect the 2 NO / 2 NC auxiliary circuits according to the original control schematic.
6. Tighten terminals using the applicable manufacturer torque specification rather than relying on hand-tightening.
7. Check conductor routing, phase identification, terminal clearance, and mechanical stability.

Stage 4 — Power-On & Testing

1. Perform a final insulation, continuity, and wiring check before energization.
2. Confirm that the contactor coil is receiving the correct control voltage.
3. Energize the control circuit first where the machine design permits.
4. Command the contactor and verify clean mechanical engagement.
5. Confirm auxiliary-contact feedback in the PLC, relay logic, or control circuit.
6. Energize the motor circuit and perform a controlled start.
7. Check motor rotation, contactor noise, terminal heating, current balance, and overload behavior.
8. If the contactor chatters, fails to pull in, or drops out unexpectedly, immediately check coil voltage, control-circuit wiring, terminal tightness, and the actual coil specification.

Frequently Asked Questions

Q1. Is the SCHIELE DL22N-22 a PLC or control module?
No. It is an electromechanical power contactor used to switch AC loads, particularly three-phase motors. Listings that describe this model as a PLC or general-purpose control module are inconsistent with the SCHIELE/Entrelec contactor documentation.

Q2. What is the motor rating of the DL22N-22?
The DL 22 N frame is associated with a 22 kW three-phase motor at 400 V AC under AC-3 duty. Actual selection must also account for motor current, duty cycle, switching frequency, and ambient conditions.

Q3. Is the coil 24 VAC?
The exact is currently listed by multiple industrial-parts sources as 24 VAC, 60 Hz. However, older SCHIELE/Entrelec contactors were available with multiple coil-voltage codes, so the physical nameplate should be treated as the final authority for a replacement.

Q4.he discontinued?
Yes. Current industrial-parts listings identhe as discontinued by the manufacturer, although surplus and used units remain available through secondary-market suppliers.

Q5. Can I replace another contactor directly a ?
Only if the coil voltage, contact arrangement, terminal layout, AC-3 rating, auxiliary contacts, and mounting dimensions all match. Do not treat the frame designation alone as proof of interchangeability.

Q6. Does the contactor include overload protection?
The contactor itself is a switching device; motor overload protection is normally provided by a correctly selected overload relay or equivalent protective device. The manufacturer documentation discusses compatible thermal overload arrangements separately.

Q7. Shoulded be accepted for a critical replacement?
Condition should be verified individually. For a used unit, inspect the contacts and housing, verify coil operation, measure contact continuity, inspect auxiliary contacts, and perform a functional switching test before installation. Market listings show both used and unused-surplus examples, so condition cannot be assumed from the model number alone.