HT INSTRUMENTS HTFLEX33e Flexible Clamp Meter
Product Information
- Safety Standards: IEC/EN61010-1, IEC/EN61010-2-032
- Isolation: Double isolation
- Pollution Degree: 2
- Measurement Category: CAT III 1000V, CAT IV 600VAC
PRECAUTIONS
- For your own safety as well as that of the apparatus, you are recommended to follow the procedures described in this instruction manual and carefully read all the notes preceded by the symbol.
- No compliance with the Warnings and/or Instructions may damage the apparatus, its components, or injure the operator.
- Read this user manual and the instrument’s one in which the clamp must be connected before starting use.
- Any instruction preceded by the caution symbol must be observed to avoid accidents or damage.
- This product must be used only by qualified personnel practicing applicable safety precautions, wearing protective clothing and gloves as required.
- Do not perform any measurement under conditions beyond the limits specified in this manual.
- Always connect the unit to the display device before installing the flexible measuring heads.
- Do not install the clamp around cables where the current flowing is greater than the maximum measurable current (Overrange).
CAUTION
- Hazardous potentials may exist close to the required current measurements.
- Use locally approved safety procedures when working near hazardous potentials.
- It is recommended not to install the clamp around a live bus that is at a hazardous potential.
- If installation is not possible when the bus is inactive or power is turned off, always use appropriate gloves and/or equipment approved for working around hazardous potentials when installing the HTFLEX33e in proximity of these potentials.
- Both the HTFLEX33e transducer and interconnection cables use double insulation to protect the operator from possible hazardous potentials of the bus.
- The current probes are rated for measurement CAT III, pollution degree 2.
- The maximum voltage to earth rating for the transducer and cable is 1000VAC.
The following symbols are used in this manual and on the accessory:
CAUTION: Refer to the instruction manual. Incorrect use may damage the apparatus or its components.
Do not apply around or remove from HAZARDOUS LIVE conductors
Double-insulated meter.
PRELIMINARY INSTRUCTIONS
- Carefully read the following recommendations and instructions before using the HTFLEX33e flexible clamp.
CAUTION
- Always de-energize the circuit under test before installing flexible measuring heads.
- Always inspect the connecting cable and the flexible measuring heads for damage before using this product
- Do not use the product if damaged
- Do not use the clamp on non-insulated conductors whose potential to earth exceeds 1000V and for frequencies over 20kHz
- Do not use the clamp outdoors
- Do not use the clamp at altitudes exceeding 2000 meters
- Do not expose the clamp to water splashes
- Avoid shocks and torsion force to the clamp, as this can affect the measurement accuracy
- Do not paint the product
- Do not apply metal labels or any other object over the product, as that could compromise insulation
- Keep the clamp gap perfectly clean
- Should the clamp be unintentionally used without a load (not connected to the measuring instrument), take the clamp off the cable, wait 1 minute before connecting the clamp to the measuring instrument, then clamp the cable again.
ACCESSORY DESCRIPTION
INTRODUCTION
- HTFLEX33e is an innovative current transducer based on the operating principle of the Rogowski coil, combining friendly use with measurement accuracy. The HTFLEX33e current probe is similar to a CT or current transformer.
- The output is an AC voltage that is, after an integrator circuit, proportional to the AC value.
- The output signal is insulated from the hazardous conductor potentials and is a replica of the current waveform in the conductor. The output signal is available via a 3-pin connector (see Fig. 1 or output signal pin assignment).
FEATURES
- The lightweight and flexible HTFLEX33e is a current probe that may be wrapped around most conductors.
- The flexible head has a preset bend that allows the transducer to be more easily operated around the conductor (see Fig. 2).
- Its application versatility and insulation rating clearly distinguish the HTFLEX33e transducer from other current measuring methods.
- It is made of non-ferrous materials, minimizing any circuit loading due to magnetic influence.
- The frequency response of the HTFLEX33e current probe is quite wide compared to conventional CTs. This allows the user to monitor a much wider range of line harmonic components than conventional CTs allow. The transducer was designed to be very flexible, with a larger opening and a smaller cross-section compared to many conventional CTs. This allows measurements in tight places as never before possible.
- The current probe was designed to allow the operator to connect this device around a conductor without disconnecting it.
- Even though the current probe output is AC, there are instances where the user wishes to orient the transducer to get proper polarity at the output terminals (e.g., active power measurements). This is done by installing the transducer around the conductor with the molded-in arrow on the latch (see Fig. 2) pointing to the direction of conventional current flow.
- Conventional current flow is defined as current flowing from the positive to the negative potential. When a three-phase plant is under test, the correspondence must be respected between the voltage probe of the measuring instrument connected and the clamp measuring the same phase.
ACCESSORY INSTALLATION
- Hazardous potentials may exist in the proximity of the desired current measurements. Use locally approved safety procedures when working close to hazardous potentials
- It is recommended not to install the clamp around a live bus that is at a hazardous potential. If installation is not possible when the bus is inactive or power is turned off, always use appropriate gloves and/or equipment approved for working close to hazardous potentials when installing the HTFLEX33e in proximity of these potentials
- It should also be noted that the current probes would produce twice the output voltage if you wrap the transducers around the conductors twice
- Make sure the clamp is correctly installed. An incorrect locking of the clamp can affect the accuracy of measurement, and this may be influenced by the presence of external wires or other sources of electromagnetic fields
- The clamp must not wrap the wire tightly. The inner diameter of the clamp must always exceed that of the conductor.
To install the clamp, follow the steps:
- Wrap the coil around the conductor, joining the two ends of the head by respecting the arrow on the rear part of the closing device (see Fig. 2), which indicates the direction of the current that, by convention, is from the generator to the load
- Fix the closure by rotating the ring clockwise as shown below.
- Turn the ring counterclockwise and remove the two ends of the head to open the clamp.
MAINTENANCE
- CAUTION
- Make sure the current probe, as well as the output cable, is clean before installing it around the conductor. If no, the contaminants on them may provide a conductive path for a high-voltage breakdown
- Check the transducer and output cables for cuts and abrasions. The transducer should not be used if damaged
- Preventive maintenance primarily consists of cleaning the transducers and cables to prevent surface contamination.
- CLEANING
- Use a mild detergent and water to clean the transducers and cables.
- Remove the detergent with clean water, then wipe dry with a clean cloth
- The use of solvents as cleaners is not recommended unless thoroughly tested and found harmless to all surfaces and parts. Do not drop the HTFLEX33e transducers or the electronics package into water or other fluids.
- END OF LIFE
- CAUTION: this symbol indicates that the accessories and their parts shall be subject to a separate collection and correct disposal.
TECHNICAL SPECIFICATIONS
REFERENCE GUIDELINES
- Safety: IEC/EN61010-1, IEC/EN61010-2-032
- Insulation: double insulation
- Pollution degree: 2
- Measurement category: CAT III 1000V, CAT IV 600VAC
TECHNICAL FEATURES
- Current ranges: max 3000 A ACRMS
- Output signal (@ 1000ARMS, 50Hz): 85mV AC
- Accuracy (@ +25C, 50Hz): class 1-A1 compliance with IEC 61869-10
- Output impedance (@ 50Hz): 170 ± 10
- Minimum load impedance: 100k
- Frequency range (-3dB): 10Hz 8kHz
- Working voltage: 1000V ACRMS
MECHANICAL FEATURES
- Coil length: 600mm (24in)
- Coil diameter: 8.3 ± 0.2mm (0.3in)
- Coil material: Thermoplastic polyurethane UL94-V0
- Type of latch: bayonet
- Output cable length: 2m ; (7ft)
- Weight: approx. 170g ; (6ounces)
- Output connector: HT Custom, 3 poles
- Maximum conductor diameter: 175mm (7in)
- Mechanical protection: IP65
ENVIRONMENTAL CONDITIONS
- Operating temperature: –20°C ÷ 80°C (–4°F 176°F)
- Storage temperature: –40°C ÷ 90°C (–40°F 194°F)
- Operating and storage humidity: 15%RH ÷ 85%RH (without condensation).
- This product complies with the prescriptions of the European directive on low voltage 2014/35/EU (LVD). This instrument complies with the requirements of 2011/65/EU+2015/863/EU (RoHS) directive and 2012/19/EU (WEEE) directive.
SERVICE
WARRANTY CONDITIONS
- This instrument is guaranteed against any defect in material and manufacturing in compliance with the general sales terms and conditions. Throughout the period of guarantee, all defective parts may be replaced, and the manufacturer reserves the right to repair or replace the product. If the instrument is to be returned to the after-sales service or to a dealer, transportation costs are on the customer’s behalf. Shipment shall b,e however, agreed upon.
- A report must always be enclosed to a rejected product stating the reasons for its return.
- To ship the instrument use only the original packaging material. Any damage that may be due to non-original packing shall be charged to the customer. The manufacturer declines any responsibility for damages caused to persons and/or objects.
Warranty is not applied in the following cases:
- Any repair that might be necessary as a consequence of the misuse of the instrument or of its use with no compatible devices
- Any repair that might be necessary as a consequence of improper packaging
- Any repair that might be necessary as a consequence of service actions carried out by unauthorized personnel
- Any modification of the instrument carried out without the authorization of the manufacturer
- Use not provided for in the instrument’s specifications or in the instruction manual.
- The content of this manual cannot be reproduced in any form whatsoever without the prior authorization of the manufacturer.
- Our products are patented, and our trademarks are registered.
- The manufacturer reserves the right to make changes in the specifications and prices if this is due to improvements in technology.
SERVICE
- If the instrument does not operate properly, before contacting the after-sales service, check cables as well as test leads and replace them if necessary.
- Should the instrument still operate improperly, check that the operation procedure is correct and conforms to the instructions given in this manual.
- If the instrument is to be returned to the after-sales service or to a dealer, transportation costs are on the customer’s behalf. Shipment shall be, however, agreed upon.
- A report must always be enclosed to a rejected product stating the reasons for its return.
- To ship the instrument, use only the original packaging material; any damage that may be due to non-original packing shall be charged to the customer.
MORE INFO
- HT ITALIA SRL Via della Boaria, 40 48018 – Faenza (RA) – Italy
- T +39 0546 621002 | F +39 0546 621144
- ht@ht-instruments.com
- www.ht-instruments.it
Frequently Asked Questions
Q: What should I do if I encounter difficulties during installation?
A: If you face any challenges during installation, refer to the user manual for detailed instructions or contact customer support for assistance.
Q: How often should I clean the accessory?
A: It is recommended to clean the accessory regularly based on your usage frequency and environmental conditions. Follow theprovided cleaning guidelines in the manual for best results.
Documents / Resources
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HT INSTRUMENTS HTFLEX33e Flexible Clamp Meter [pdf] Instruction Manual HTFL EX33e, HTFLEX33e, HTFLEX33e Flexible Clamp Meter, HTFLEX33e, Flexible Clamp Meter, Clamp Meter, Meter |