System Components Surge Arrester HAW 261 and HAW 262

Transcription

1 Technical Information TI 108F/00/en System Components Surge Arrester and Operating Instructions Part. No for power supply side for signal input side (2-wire) (2 and 3-wire) Application The surge arrester protects a measuring instrument line side against surges and voltage peaks which occur due to atmospheric electrical charges or switching processes in the power supply. Function Both wires of the power cabling are protected through a surge diverter and a surge-resistant resistor which limits the current when the arrester responds. Application The surge arrester protects a measuring instrument signal side against surges and voltage peaks which occur in cables due to atmospheric electrical charges or interference. The surge arrester is used for signal cables having voltages up to 20 V, cable to ground, or up to 40 V, cable to cable (non-grounded), and currents up to 30 ma. Function The surge arrester protects 2 and 3-pole signal inputs or outputs of a measuring unit. The overvoltage is discharged through a surge diverter in the cabling or a surge-resistant current limiting resistor and a Transzorb diode at the instrument. Endress +Hauser Nothing beats know-how

2 Installation L1 N power supply with surges The protects a measuring instrument line side against surges. Install the surge arrester near to the measuring instrument or transmitter to be protected. input surge arrester output Mounting On mounting rail conforming to D page 1 or on standard rail conforming to EN x 7.5 or EN x 15 or in a protective housing IP 55. protected unit Application of surge arrester power supply L1 N Connection Connect the surge arrester as shown in figure. Note the coding of the terminals: = line side (above) light grey cover L1 N ground = instrument side (below) The connecting terminals for the power supply (L1 and N) are designed for a cable cross-section of max. 2.5 mm 2. A cable of cross-section max.6 mm 2 can be connected to the ground terminal on the side. protected unit Wiring diagram for 600V- 24 Ω/7W The ground connection must be short and of low resistance and inductance (ground wire). Local regulations for grounding must be observed at all times. Take care that the permissible line resistance between the transmitter and protected unit is not overstepped by the insertion of the surge arrester. 24 Ω/7W 600V- Circuit diagram of 2

3 Installation signal cabling with surges+voltage peaks The protects the signal of a measuring instrument against surges. Install the surge arrester near to the measuring instrument or transmitter to be protected. input surge arrester output Mounting On mounting rail conforming to D page 1 or on standard rail conforming to EN x 7.5 or EN x 15 or in a protective housing IP 55. protected unit or transmitter Application of surge arrester Wiring diagram for e.g. unit to be protected ground (darke grey cover) e.g. transmitter to be protected signal cabling *polarity (connection +/-)as required (darke grey cover) ground Connection Connect the surge arrester as shown in the Figure. Note the coding of the terminals: = instrument side (above) = cable side (below) The connecting terminals for the power supply are designed for a cable cross-section of max. 2.5 mm 2. A cable of cross-section max.6 mm 2 can be connected to the ground terminal on the side. 2 7,5 Ω/7W 1 The ground connection must be short and of low resistance and inductance ("ground wire"). Local regulations for grounding must be observed at all times. D1 27 V 90 V- Note that the signal outputs from the instrument used for the analogue signal (current or voltage) may only be grounded at the negative pole when they cannot be laid ungrounded. 2 D1 27 V 7,5 Ω/7W 90 V- 1 Take care that the permissible line resistance between the transmitter and protected unit is not overstepped by the insertion of the surge arrester. Circuit diagram of (two-wire) 3

4 Dimensions , conforming to D , page 1 conforming to EN x ,5 conforming to D , page 1 conforming to EN x Dimensions in mm of Dimensions in mm of Mounting rail ➀ ➀ ➁ ➁ Mounting on a standard rail rail to D rail to EN

5 Protective Housing Protective housing For one surge arrester or Housing: aluminium (Al Si 12) Protection to D 40050: IP 55 Mounting plate: acid-resistant stainless steel Cable glands: 2 x PG 16 Permissible ambient temperature: -20 C C Weight (without HAW): approx. 1.2 kg Protective housing Subject to modification standard rail mounted on delivery connect HAW ground terminal to ground terminal in housing Connecting the surge arrester ground attachment bore hole 54 latch approx. 170 approx Dimensions in mm of the protective housing and bore holes for attaching the mounting plate to the wall 75 PG 16 5 max. Al 31 area required for mounting approx. 120 Mounting 1. Securely screw the mounting plate onto an even-surfaced wall 2. Mount the housing so that the upper edge of the lower housing unit locks with the upper edge of the latch 3. Slide the housing approx. 1 cm downwards Dismantling: Press the latch against the wall using a tool (e.g. screwdriver) and then slide the housing approx. 1 cm upwards. 5

6 Technical Data Surge arrester Surge arrester For 2 or 3 wires Electrical Power supply: up to 240 V, +15%, 50/60 Hz, single phase Max. current consumption of unit to be protected: 0.2 A Surge voltage of arrester: 1000 V (typical) Nominal surge current (threshold 8/2 s): 20 ka Series resistance per core: 24 Ω Electrical Max. signal voltage (peak value): 20 V (to ground) Surge voltage of arrester: 600 V (typical) Nominal surge current (threshold 8/2 s): 20 ka Operating voltage of the Transzorb diodes: 27 V (typical) Series resistance per core: 7.5 Ω Mechanical Permissible ambient temperature: -20 C C Connecting terminals: for max. 2.5 mm Ground connection: for max. 6 mm Housing and cover: light grey PPO Protection to D : housing IP 40, terminals IP 20 Weight: approx. 0.1 kg Mechanical Permissible ambient temperature: -20 C C Connecting terminals: for max. 2.5 mm Ground connection: for max. 6 mm Housing: light grey PPO Cover: dark grey PPO Protection to D : housing IP 40, terminals IP 20 Weight (two-wire): approx. 0.1 kg Weight (three-wire): approx kg How to Order Type Order No. Surge Arrester Surge Arrester (two wire) Surge Arrester (three wire) Protective housing Endress+Hauser GmbH+Co. Instruments International P.O. Box 2222 D Weil am Rhein Germany Tel. ( ) Tx Fax ( ) Endress +Hauser Nothing beats know-how 08.93/MTM TI 108F/00/en/01.97 GW/CV4.2