Patte 1535 Testeur de résistance d'isolation

Model positioning: Basic digital megohmmeter with 250-2500 V test voltage; no data storage or USB communication. The higher-end model 1537 features data storage, USB communication, fine-tunable test voltage, ramp test, and AC/DC voltage measurement.

1. Spécifications électriques de base

2. Comparaison des modèles: 1535 contre 1537

3. Standard Packaging List

Standard Deliverables:

1. Patte 1535 Unité principale
2. 3-colour test leads (rouge, black, vert) with alligator clips
3. Red-black test probes
4. Soft carrying case
5. Manuel d'utilisation & quick-start guide

❗ Not included: USB cable, Logiciel PC, hard-shell tool case (commander séparément); 8-AA batteries to be provided by user.

4. Applications typiques
5. Insulation testing for motor & generator windings (low-voltage and medium-voltage motor pre-testing)
6. Insulation preventive testing for transformers, cables and busbars
7. Insulation test for DC side of PV arrays (2500 V range suitable for photovoltaic strings)
8. On-site electrical maintenance, fault troubleshooting, pre-/post-overhaul insulation evaluation
9. Plant equipment spot-check; handheld on-site use for scenarios without report-generation requirements

👉 Upgrade to Fluke 1537 if you need data logging, report export, ramp withstand test or fine voltage adjustment.

5. Selection Pitfalls & Hard-rule Warnings
6. 1535 has no storage and cannot export reports via PC. PI / DAR values must be manually recorded on-site; do not expect CSV export after purchase.
7. Short-circuit current is only ＞2 mA. For large-capacity long-length cables, charging time is longer and readings stabilize slower compared with the 1537 (5 mA).
8. Never perform insulation tests on live circuits. The instrument triggers alarm above 30 V, but full power-off and adequate discharge of the unit-under-test are mandatory.
9. La condensation est interdite. Measurement distortion occurs under high-humidity conditions with dew formation.
10. Derate operation above 2000 m altitude; full-range 2500 V testing is not recommended.
11. Always wait for automatic discharge completion and verify zero residual voltage before disconnecting test leads.
12. Compatible Alternatives

Mise à niveau de même marque: Patte 1537 (identical form factor, adds storage, USB and ramp test)

Equivalent competitors: Megger MIT2500; HIOKI IR3455-30

Full Comparison: Patte 1535 vs Fluke 1537 Testeur de résistance d'isolation

These two models share identical enclosure, dimensions, weight and base measuring range. Key differences lie in short-circuit current, voltage tuning, advanced test functions, data-logging communication and additional multimeter features.

Key Difference Explanations

1. Short-circuit current (easily overlooked parameter)

Le 1537 delivers ＞5 mA short-circuit current: for long cables and large-capacitance motor windings, charging completes rapidly without long waiting for stable readings.

Le 1535 provides only ＞2 mA. Long stabilization time is required for high-capacitance test objects; it suits small-to-medium motors and short cables.

2. Exclusive Ramp test for 1537

Performs withstand-voltage scanning with gradual voltage rise to pinpoint insulation weak points. Widely used in motor overhaul, high-voltage pre-test and incoming-product inspection. Le 1535 outputs fixed high voltage only and cannot execute gradual-ramp tests.

3. Data logging & report output

Patte 1535: No onboard storage; all readings must be manually transcribed. Suitable for spot-checks, fault-finding and work without formal reporting requirements.

Patte 1537: Stores multiple test sets, exports data via PC and generates reports. Ideal for third-party inspection, power-industry preventive testing, PV site acceptance and archive-oriented workflows.

4. Built-in AC/DC voltage measurement

Le 1537 integrates basic multimeter functions to verify residual voltage on-site without carrying an extra multimeter, improving convenience in substation work.

Selection Guidance

✅ Choose Fluke 1535:

Routine plant spot-check and fault diagnosis

Small-to-medium motors and short-length cables

No data-storage or formal-report requirement, manual paper-based logging

Budget-constrained projects

✅ Choose Fluke 1537:

Formal test-report generation and data archiving

Test objects include long-distance power cables, large-capacity motors and large transformers

Advanced insulation diagnostics: Ramp test & Dielectric Discharge for aged-insulation assessment

Non-standard test-voltage requirements (par exemple. 1700 V, 2100 V)

All-in-one instrument for insulation test plus on-site voltage measurement

Packaging Differences

Patte 1537: Main unit, test leads & probes, soft case; USB cable and PC software CD included. Hard-shell tool case sold separately.

Both models require user-supplied 8-AA batteries.

Hard-rule Notes

1. Both instruments require fully power-off test objects. The 30-V live-circuit alarm serves as a reminder and cannot replace formal power-cut & voltage-verification procedures.
2. Avoid applying the 1535 to ultra-capacitive long cables: long charging cycles and reading drift may occur.
3. Le 1537 stores data locally without onboard printing; reports must be generated after importing datasets to PC software.

Patte 1535 vs 1537｜Selection Conclusion for Power-industry Applications

For power-sector applications (preventive testing, substations, distribution networks, third-party accredited testing agencies), select the Fluke 1537 par défaut. Le 1535 is only acceptable for simple fault-finding without formal data archiving.

Power-field Comparison (aligned with DL/T preventive-test specifications)

Scenario-based Recommendations

✅ Mandatory selection: Patte 1537 (Most power-industry scenarios)

1. Power-utility substation maintenance, distribution-network preventive testing and equipment condition evaluation
2. Accredited third-party power-testing services requiring formal traceable test reports
3. Test subjects include long-distance power cables, high-capacity distribution transformers and generators / gros moteurs
4. Advanced insulation diagnostics: ramp-voltage scanning and Dielectric Discharge assessment for aged insulation
5. Digital-operation workflows with PC-imported datasets linked to equipment asset ledgers

For high-capacitance test items in power preventive tests, 5 mA short-circuit current is a critical performance index. The 2 mA output of the 1537 results in prolonged unstable readings for long-length cables and reduces field efficiency.

✅ Acceptable selection: Patte 1535 (Limited scenarios only)

1. Distribution-network emergency repair and on-site fault troubleshooting without formal preventive-test reporting or long-term archiving
2. Test objects are small-capacity equipment and short cables with low capacitance
3. Budget constraints, qualitative insulation judgement only; all PI/DAR values manually logged on paper.

Critical Selection Warnings

1. The Fluke 1535 cannot export data. Not recommended for accredited third-party testing or acceptance projects where report traceability is mandatory.
2. Maximum test voltage for both instruments is 2500 V. Neither can perform 5000-V insulation tests for ≥10 kV main transformers. Select Fluke 1555 / 1550C for 5-kV-range requirements.
3. Both units feature CAT IV 600 V safety rating, auto-discharge and residual-voltage indication with identical safety performance.

Conseils en matière d'approvisionnement

Standard power-team configuration: Primary tester = Fluke 1537. Supplement with a small quantity of 1535 units for emergency-repair crews for fast fault diagnosis.

Hard-shell carrying cases and extended-length test-lead kits are not standard accessories for the 1537. These are strongly recommended for power-site deployment.