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Comet series
Voltage detectors with built-in self-test
The Comet voltage detectors from Horstmann are used to determine the operating voltage, with a clear indication of “voltage present” or “voltage not present”. They have an integrated self-test, which is used to carry out a function check before use.
Developed with a clear focus on the requirements of technicians, these robust test devices not only offer maximum measuring accuracy but also integrated self-testing, which increases your safety and makes everyday work easier.
Whether for maintenance, installation, or troubleshooting, the Comet series supports you with sophisticated functions and durable quality. Rely on proven technology “Made by Horstmann” to make your work efficient and safe. The robust design withstands even demanding working conditions, while the intuitive operation enables precise measurements even in hard-to-reach areas.
The Comet series consists of six appliances:
- Comet BL-I | Comet BL-A – Classic design
- Comet BS-I | Comet BS-A – Classic design + switchable
- Comet BK-I | Comet BK-A – Shortened design
In accordance with DGUV regulation 3 (Table 1c), all Comet appliances are subject to the maintenance test prescribed every 6 years.
Comet BL-I | Comet BL-A
Product features
- According to IEC 61243-1 (VDE 0682-411) Category S
- Comet BL-I: Design for the interior
- Comet BL-A: design for outdoor use
- Voltage indication visual or visual and audible
- Built-in self-test
BL-I / BL-A are single-pole, capacitive voltage detectors. The voltage detectors are provided with a built-in self-test facility which checks the function of the circuit including the contact electrode (comprehensive self-test function) before each use.

Technical data
Comet BL-I | Comet BL-A | |
---|---|
Application |
|
Indication |
|
Nominal voltage | 50 Hz (optional 60 Hz) |
Power supply | 2 lithium cells 6-year operational readiness with 10 standby cycles / day and 230 working days / year |
Operating temperature | -25 °C to +70 °C, climate class N and W |
Nominal voltage [kV] | Total length a [mm] | Insertion depth b [mm] | Order no. Comet BL-I (indoor) Optical | Order no. Comet BL-I (indoor) Optical and acoustic | Order no. Comet BL-A (outdoor) Optical | Order no. Comet BL-A (outdoor) Optical and acoustic |
---|---|---|---|---|---|---|
5 | 1.270 | 462 | 50-0901-011 | 50-0903-008 | 50-1001-009 | 50-1003-009 |
10 | 1.270 | 462 | 50-0901-012 | 50-0903-009 | 50-1001-010 | 50-1003-010 |
20 | 1.420 | 612 | 50-0901-013 | 50-0903-010 | 50-1001-011 | 50-1003-011 |
6-10 | 1.420 | 612 | 50-0901-014 | 50-0903-011 | 50-1001-012 | 50-1003-012 |
10-20 | 1.570 | 762 | 50-0901-015 | 50-0903-012 | 50-1001-013 | 50-1003-013 |
20-30 | 1.570 | 762 | 50-0901-022 | 50-0903-018 | 50-1001-015 | 50-1003-018 |
Comet BS-I | Comet BS-A
Product features
- According to IEC 61243-1 (VDE 0682-411) Category S
- Voltage detectors for nominal voltages between
5 and 30 kV, switchable - Comet BS-I: Design for the interior
- Comet BS-A: design for outdoor use
- Voltage indication visual or visual and audible
- Shortened design
- Integrated self-testing
The Comet BS-I and BS-A are single-pole, switchable voltage detectors in a shortened design. The voltage detectors are provided with a built-in self-test facility which checks the function of the circuit including the contact electrode (comprehensive self-test function) before each use.
The turning knob is used to select between three nominal voltage ranges:
0: Off
1: 5 – 10 kV
2: 10 – 20 kV
3: 20 – 30 kV
Technical data
Comet BS-I | Comet BS-A | |
---|---|
Application |
|
Indication |
|
Nominal voltage | 50 Hz (optional 60 Hz) |
Power supply | 2 lithium cells 6-year operational readiness with 10 standby cycles / day and 230 working days / year |
Operating temperature | -25 °C to +70 °C, climate class N and W |
Nominal voltage [kV] | Total length a [mm] | Insertion depth b [mm] | Order no. Comet BS-I (indoor) Optical | Order no. . Comet BS-I (indoor) Optical and acoustic | Order no. Comet BS-A (outdoor) Optical | Order no. Comet BS-A (outdoor) Optical and acoustic |
---|---|---|---|---|---|---|
5-30 | 1.570 | 758 | 50-0921-001 | 50-0923-001 | 50-1021-001 | 50-1023-001 |
Comet BK-I | Comet BK-A
Product features
- According to IEC 61243-1 (VDE 0682-411) Category L (overhead line)
- Comet BK-I: Design for the interior
- Comet BK-A: design for outdoor use
- Voltage indication visual or visual and audible
- Shortened design
- Integrated self-testing
The Comet BK-I and BK-A are single-pole, capacitive voltage detectors in a shortened design. The circuit including the contact electrode is tested (complete self-test).
Technical data
Comet BK-I | Comet BK-A | |
---|---|
Use |
|
indication |
|
Nominal frequency | 50 Hz (optional 60 Hz) |
Supply | 2 lithium cells 6-year operational readiness with 10 standby cycles / day and 230 working days / year |
Operating temperature | -25 °C to +70 °C, climate class N and W |
Nominal voltage [kV] | Total length a [mm] | Insertion depth b [mm] | Order no. Comet BK-I (indoor) Optical | Order no. Comet BK-I (indoor) Optical and acoustic | Order no. Comet BK-A (outdoor) Optical | Order no. Comet BK-A (outside) Optical and acoustic |
---|---|---|---|---|---|---|
6-10 | 900 | 110 | 50-1301-001 | 50-1303-001 | 50-1401-001 | 50-1403-001 |
10-20 | 900 | 210 | 50-1301-002 | 50-1303-002 | 50-1401-002 | 50-1403-002 |
All important documents for the device
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Matching articles
PERFECT MATCH
Here you will find the matching equipment set and accessories for this item. All components are technically matched to each other and guarantee optimum functionality. For customer-specific requirements and individual offers, please contact our sales department.
Equipment set
- 1 Comet voltage detector
Accessories
- Handle extension
- Contact tip
- Catch fork
- Storage bag/case
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