Capacitor Box Assembly 012702 — 2 Capacitors + Thermal Protection, 2.2 kW Motor, Moldova

What Is the Capacitor Box Assembly 012702

The capacitor box 012702 is a factory mounting assembly designed to accommodate two capacitors (start and run) and a bimetallic thermal protection relay on the housing of, or adjacent to, a single-phase asynchronous 2.2 kW motor.

Part number breakdown: 012702 — internal catalogue position of Acvatron SRL; the numeric format without a manufacturer alphanumeric code designates a universal-application stock item.

The assembly consists of: a plastic or metal enclosure with lid (protection rating IP44–IP54 depending on version), two bracket-style slots for cylindrical capacitors 40–50 mm in diameter, a terminal block for phase conductor routing, and a mounting seat with clamp for a bimetallic relay (thermal protection) trip class 10A per IEC 60947-4-1.

Key property: the box is a passive mounting element — it contains no active components and requires no adjustment. All electrical parameters are determined by the capacitors and thermal protection installed, which are selected separately according to the nameplate data of the 2.2 kW motor.

Technical Specifications

💡 Expert Tip: When selecting capacitors for this box, refer to the motor nameplate data: run capacitor — typically 40–70 µF / 450 V AC, start capacitor — 100–250 µF / 250 V AC for a 2.2 kW motor. Never install a capacitor with a voltage rating lower than specified on the nameplate — dielectric breakdown will occur within the first hours of operation.

Brand Equivalents

⚠️ Warning: The GE-CB22 equivalent carries a UL certificate (USA) rather than CE (EU/Moldova). Use without CE marking on facilities subject to mandatory certification in the Republic of Moldova may cause compliance issues and insurance complications.

5 mandatory compatibility check parameters:

1. Slot diameter: must match your capacitor housing (standard — 40 or 50 mm).
2. Thermal protection seat presence: relay type (bimetallic) and dimensions must match.
3. Number of slots: 2 (start + run) — required for CSCR wiring scheme.
4. IP protection rating: minimum IP44 for compressor compartment, IP54 — if moisture/splash present.
5. Mounting type: motor housing or wall — verify that holes align with your motor’s fixing pattern.

Applications

Piston Compressors for Workshops and Auto Service

• 50–100 L compressors, 220 V, 2.2 kW motor — the most common application.
• Replacement of a failed/burnt mounting assembly without changing the electrical schematic.
• Post-overheating repair: box installed together with a new thermal relay.

Industrial Facilities with Single-Phase Power Supply

• Packaging equipment, spray compressors, sandblasting units.
• Wherever three-phase power is unavailable — 220 V + capacitor start.

Pump Stations and Irrigation Systems

• Single-phase 2.2 kW pumps with capacitor start.
• Replacement after moisture ingress into the original capacitor block.

Woodworking and Agricultural Equipment

• Planers, thicknessers, grain mills with single-phase 2.2 kW motor.
• Upgrading older machines to a modern thermal protection scheme.

Capacitor Box Replacement Procedure

6. De-energise the equipment. Switch off power, disconnect the phase from the motor terminal box. Verify absence of voltage with a multimeter — capacitors retain charge for up to 5 minutes after shutdown.
7. Record the wiring diagram. Photograph or sketch the conductor colour coding before disassembly. A CSCR capacitor scheme has a minimum of 4–5 conductors with different functions.
8. Remove the old assembly. Loosen capacitor clamps or brackets, disconnect thermal protection terminals, unscrew the enclosure fixing (M4 × 2–4 points).
9. Install box 012702. Secure the enclosure on the motor or alongside — using M4 screws or bolts in the standard holes. Ensure the box does not contact any moving parts.
10. Install capacitors and thermal protection. Insert capacitors into the brackets, secure with clamps. Install the bimetallic relay in its seat and tighten the clamp.
11. Reconnect conductors and verify. Restore wiring per the photograph (step 2). Tighten all terminals to 1–1.5 N·m. Power up, verify start and normal operating mode (run capacitor current per nameplate ±10%).

Why Acvatron SRL — 5 Solid Reasons

Engineering-Based Kit Selection

Our engineer will select not only box 012702 but also the correct capacitors (capacitance, voltage, series) and thermal relay matching the specific nameplate data of your 2.2 kW motor. You receive a complete engineering solution, not a collection of parts.

Complete Compressor Maintenance Range

Acvatron SRL is one of the largest suppliers of consumables and spare parts for piston compressors in Moldova. Capacitors, thermal protections, pressure switches, belts, piston rings, valves — all in a single order.

Stock Available in Chisinau

Item 012702 and related components are held in stock in Chisinau. Same-day dispatch on available stock — compressor downtime is measured in money, not waiting time.

Technical Support

No motor nameplate or datasheet? Not a problem. Based on the compressor brand, a photo of the motor nameplate, or current measurements, the Acvatron SRL engineer will determine the required capacitor and thermal protection parameters.

Documentation for Legal Entities

Invoice, delivery note, CE declaration of conformity — full document package for any business structure. VAT-registered. Supply agreement concluded within one business day.

Expert Opinion

“The most common mistake when repairing a capacitor block is fitting a capacitor of ‘the same size’ without checking the actual capacitance. Visually identical cans can be 50 µF and 70 µF. An undersized run capacitor causes continuous winding overheating — the motor runs, but burns itself out within 3–6 months. Always measure the old capacitor with a capacitance meter or take the values from the motor datasheet. Box 012702 is designed for standard dimensions — but the components inside must be exact.” — Vitali Bolucevschi, Chief Engineer at Acvatron SRL, 15 years in the industry.

Handling Objections

“I can find it cheaper elsewhere”

Unbranded boxes from the market are often made from recycled plastic with no IP marking — the housing cracks from vibration after just 1–2 seasons. The absence of CE marking means the unit cannot be officially operated on facilities with mandatory certification. The cost of a repeat compressor repair and production downtime far exceeds the price difference.

“You don’t have the part number / size I need”

Item 012702 covers the most common dimensional standard for 2.2 kW motors. If your motor is non-standard, the Acvatron SRL engineer will source an equivalent from the extended range or propose a unified solution with adapter clamps.

“I’m not sure if it’s compatible with my compressor”

Send us a photo of your motor nameplate and the old box — the engineer will confirm compatibility within 15 minutes. We do not sell blind: if the item does not fit, we will say so directly and offer the correct replacement.

Problems You Have Already Faced

• The compressor hums but does not start — the start capacitor has failed and the mounting block has melted.
• Thermal protection trips every 10–15 minutes despite normal load — the relay has degraded or was incorrectly selected.
• After a “repair” by a local technician the motor runs but overheats — the run capacitor was chosen incorrectly.
• The original capacitor block housing cracked from vibration and conductors are left unprotected.
• No replacement documentation — nothing to present in the event of a warranty claim or technical audit.

Every day a motor operates on mismatched capacitors is hidden winding wear that will manifest at the worst possible moment.

FAQ

❓ Are capacitors included with the 012702 box?

No. Box 012702 is an assembled mounting enclosure without capacitors or thermal protection. Capacitors and the bimetallic relay are selected separately according to the nameplate data of your 2.2 kW motor. This approach ensures universality: a single enclosure is compatible with a wide range of capacitances and thermal protection types. Acvatron SRL will help you select the complete kit.

❓ Which capacitors are required for a 2.2 kW, 220 V motor?

Typical values for a single-phase 2.2 kW motor: run capacitor — 50–70 µF / 450 V AC (CBB65), start capacitor — 150–250 µF / 250 V AC (CD60). Exact values are always stated on the motor nameplate or in the datasheet. Never use capacitors with a voltage rating below the specified value — dielectric breakdown occurs within the first hours of operation.

❓ How do I select thermal protection (thermal relay) for a 2.2 kW motor?

The bimetallic relay is selected based on the motor’s rated operating current. For a 2.2 kW / 220 V motor, the rated current is approximately 10–12 A. The relay must have an adjustment range covering this current with a 15–20% margin. Trip class — 10A per IEC 60947-4-1. Acvatron SRL supplies thermal relays matched to specific parameters.

❓ Can box 012702 be installed on a compressor of a different power rating?

Mechanically — yes, if the capacitor and relay diameters match the enclosure slots. However, the box contains no integrated active components, so electrical compatibility is determined solely by the capacitors and thermal protection you install. For motors of significantly different power (e.g. 3.0 kW and above), we recommend consulting an Acvatron SRL engineer.