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Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Basler Electric |
| Model | ICRM-15 |
| Part Number | 9387900104 |
| Product Type | Inrush current reduction module |
| Primary Function | Limits startup current to protect PWM voltage-regulator power stages |
| AC Input Voltage | 90–277 V AC |
| DC Input Voltage | 90–300 V DC |
| Input Frequency | DC, 50–420 Hz |
| Rated Input Current | 18 A AC |
| Internal Resistance, Cold Test | Approximately 0.5 Ω between each IN/OUT pair |
| Power Dissipation | 25 W |
| Number of Power Paths | 3: A, B, and C |
| Output Connections | Regulator-specific A-OUT, B-OUT, and C-OUT terminals |
| Compatible Regulators | AVC63-12, AVC125-10, DECS-200, DECS-250, SR Retrofit, SSR Retrofit |
| Operating Temperature | −25 to +70 °C |
| Storage Temperature | −40 to +70 °C |
| Dielectric Strength | 2,000 V AC for 1 minute per IEC 60255-5 |
| Shock Rating | 15 G in three perpendicular planes |
| Vibration Rating | 2 G, 10–500 Hz, per IEC 60255-21-2 |
| Weight | Approximately 227 g |
| Cooling | Natural ventilation; mount vertically for maximum cooling |
| Certifications | cURus recognition, CE, UKCA, China RoHS |
| Serviceability | No user-serviceable components |
| Condition | Must be stated as New Original, New Surplus, or Refurbished (tested) |
Basler ICRM-15, part number 9387900104, limits inrush current when a voltage regulator is energized from a low-impedance source at or near its rated voltage. It is intended for PWM regulator power stages that contain substantial input capacitance.
Basler lists ICRM-15 compatibility with AVC63-12, AVC125-10, DECS-200, DECS-250, SR Retrofit, and SSR Retrofit systems. The ICRM-7 is a different model for DECS-100 and DECS-150 equipment.
Product Introduction
Basler ICRM-15 is an inrush current reduction module for generator excitation and automatic-voltage-regulator systems. It inserts temporary series resistance during power-up, then reduces that resistance to permit normal steady-state operation.
The module is required when a compatible PWM regulator receives switched, near-rated voltage from a low-impedance station-service or auxiliary source. Verify the regulator model, input voltage, phase wiring, terminal numbers, and five-minute cooldown requirement before commissioning.
ICRM-15
ICRM-15
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Regulator does not receive power | Incorrect IN/OUT wiring, open input fuse, or insufficient source voltage | ✅ High | Verify source voltage at the ICRM input and regulator voltage at A-OUT/B-OUT/C-OUT | Correct wiring and source voltage before replacing the module |
| Regulator trips at startup | ICRM missing, failed, or connected to the wrong regulator terminals | ✅ High | Compare wiring with the Basler regulator-specific terminal table | Install the correct ICRM-15 and verify all three output paths |
| Output voltage is absent | Open internal path, failed thermistor/resistor assembly, or loose terminal | ✅ High | Remove power, isolate all wiring, and measure each IN-to-OUT path; expected resistance is approximately 0.5 Ω | Replace the ICRM-15 if any path is open or shorted |
| Regulator starts but resets | Source impedance, input wiring, or inrush limiting fault | ✅ High | Monitor regulator input voltage during energization and check all ICRM connections | Correct the supply and replace the module if the voltage collapses across it |
| Module becomes hot | Normal power dissipation, inadequate ventilation, overload, or failed regulator | ✅ Possible | Measure case temperature and inspect vertical mounting and airflow | Improve cooling and investigate regulator current before replacement |
| One phase does not pass power | Open A, B, or C path, loose terminal, or wiring error | ✅ High | Measure each phase path separately with power isolated | Repair the terminal connection or replace the module |
| ICRM fails again after immediate restart | Insufficient cooldown interval | ✅ High | Confirm at least five minutes elapsed after removing operating power | Wait the full cooldown period before reapplying power |
| Regulator works from PMG but not from station service | Inrush protection omitted or wrong connection method | ✅ High | Compare the source type and regulator input wiring with Basler application guidance | Add when switched, near-rated voltage is applied |
| AVR operates normally without ICRM | Source ramps slowly or has sufficient impedance | ❌ Low | Review the source waveform and energization method | Do not remove required protection without Basler approval |
| ICRM shows physical discoloration | Excessive inrush, repeated rapid cycling, overload, or thermal damage | ✅ High | Inspect terminals and enclosure; record operating history | Replace the module and identify the cause of excess heating |
| Wrong module installed | ICRM-7 used with an application or vice versa | ✅ High | Compare regulator model with Basler’s ICRM cross-reference | Use for the listed compatible regulator families |
| Regulator receives power but operates abnormally | Output wiring does not match the regulator’s phase terminals | ✅ High | Verify the regulator-specific terminal mapping, not only A/B/C phase labels | Rewire according to the exact regulator manual |
Critical warning: Remove operating power and wait at least five minutes before restoring power after an energized has been switched off. The cooldown interval allows the module to regain its inrush-limiting capability.
Frequently Asked Questions (FAQ)
What is Basler ?
It is an inrush current reduction module, part number 9387900104, used to protect compatible Basler PWM voltage regulators during power-up. It limits the initial charging current caused by the regulator’s input capacitance.
Which Basler regulators use ?
Basler lists for AVC63-12, AVC125-10, DECS-200, DECS-250, SR Retrofit, and SSR Retrofit systems. ICRM-7 is intended for DECS-100 and DECS-150, so the two modules are not interchangeable by model number alone.
When is required?
It is typically required when a PWM regulator receives rated or near-rated voltage from a low-impedance source that is switched by a relay, contactor, or circuit breaker. PMG, auxiliary-winding, and shunt-fed sources that ramp voltage with generator speed often do not require an ICRM.
Can I use on a DC supply?
Yes, the specified DC input range is 90–300 V DC. Confirm the regulator’s approved supply arrangement, wiring, current demand, and polarity before applying DC power.
How do I test an ?
Remove power, disconnect all wiring, and measure resistance between A-IN and A-OUT, B-IN and B-OUT, and C-IN and C-OUT. Each path should measure approximately 0.5 Ω. An open circuit or short circuit indicates replacement is required.
Does need a five-minute cooldown?
Yes. Basler specifies a minimum five-minute interval after removing operating power from an energized ICRM before power is restored. Rapid cycling can defeat the intended inrush-limiting function.
Is the unit new or refurbished?
The part number does not establish condition. State the actual status as New Original, New Surplus, or Refurbished (tested). A suitable test report should include all three IN-to-OUT resistance checks, insulation testing, terminal inspection, enclosure condition, and a controlled startup with the correct Basler regulator.
