LF306-S LEM | Alldatasheet
Document overview
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- PDF pages: 3
Technical content
Features
- Closed loop (compensated) current transducer using the Hall effect
- Insulated plastic case recognized according to UL 94-V0. Advantages
- Excellent accuracy
- Very good linearity
- Low temperature drift
- Optimized response time
- Wide frequency bandwidth
- No insertion losses
- High immunity to external interference
- Current overload capability.
Applications
- AC variable speed drives and servo motor drives
- Static converters for DC motor drives
- Battery supplied applications
- Uninterruptible Power Supplies (UPS)
- Switched Mode Power Supplies (SMPS)
- Power supplies for welding applications. Application Domain
- Industrial. IPN = 300 A 16130
LEM www .lem.com Page 2/3LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Current Transducer LF 306-S Isolation characteristics Vd R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn 6 kV Vw Impulse withstand voltage 1.2/50 µs >7.3 kV Min dCp Creepage distance 8 mm dCl Clearance distance 7.15 mm CTI Comparative Tracking Index (Group III a ) 175 Application examples According to EN 50178 and IEC 61010-1 standards and following conditions :
- Over voltage category OV 3
- Pollution degree PD2
- Non-uniform field Safety This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer's operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a built-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected. EN 50178 IEC 61010-1 dCp, dCI, Rated isolation voltage Nominal voltage Single isolation 600 V 600 V Reinforced isolation 300 V 300 V VW
LEM www .lem.com Page 3/3LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Mechanical characteristics
- General tolerance ± 0.5 mm
- Fastening transducer Flat position 2 holes ∅ 6.6 mm
2 M6 steel screws
Recommended fastening torque 4.2 Nm or 3.1 Lb.-Ft. Or 2 holes ∅ 2.25 mm 2 x PT KA25 screws Recommended fastening torque 0.3 Nm or 0.22 Lb.-Ft. Vertical position 2 holes ∅ 4.3 mm
2 M4 steel screws
Recommended fastening torque 3 Nm or 2.21 Lb. - Ft. Or 2 holes ∅ 2.25 mm 2 x PT KA25 screws Recommended fastening torque 0.3 Nm or 0.22 Lb.-Ft.
- Primary through-hole 25.5 x 25.5 mm
- Connection of secondary Molex 5045-03/AG Dimensions LF 306-S (in mm. 1 mm = 0.0394 inch) Bottom view Right view Back view Front view Connection Remarks
- IS is positive when IP flows in the direction of the arrow.
- Temperature of the primary conductor should not exceed 100°C.
- Dynamic performances (di/dt and response time) are best with a single bar completely filling the primary hole.
- This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), Rep. Clearance Creepage A-B 7.15 mm 8.00 mm