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I-GARD         DSP-OHMNI Instruction Manual

36

J3 RS-485

Communications

  20 Conductor

Cable to DSP-DPS

To Next Device, or

Converter

J1

Figure 15.6 DSP-DM Display Module Connections

16

ADDITIONAL INFORMATION

If you require more information or experience problems with your equipment that persist after taking the steps 

identified in this manual, 

please contact I-Gard Customer Service.

 

Summary of Contents for IPC DSP OHMNI

Page 1: ...Instruction Manual C 409 HIGH RESISTANCE GROUNDING SYSTEM DSP OHMNI DSP OHMNI the power to protect...

Page 2: ...hould be stored in their original containers in an area free of dust and moisture DSP Second Fault Protection unnecessary outages of electrical power in continuous process industries or in critical sy...

Page 3: ...irements 5 Table 3 2 Standard Ribbon Cables 5 Table 6 1 Pulsing Frequency Selection 17 Table 13 1 MODBUS RTU Standard 8 Byte Holding Register Read Function 03 26 Table 13 2 Returned Information Struct...

Page 4: ...ful 14 Figure 6 9 Pulse Set up Request 15 Figure 6 10 Pulse Mode Set up 15 Figure 6 11 Typical Examples of Pulse Circuit Connection 16 Figure 6 12 Alarm relay Setup 17 Figure 6 13 Alarm relay Options...

Page 5: ...artment of switchgear The modules are connected together through 20 conductor standard ribbon cable A panel mounted Display module provides a human interface to the system and communications to a RS 4...

Page 6: ...1 120V DDR2 2 240V DDR2 4 480V DDR2 6 600V Also used with potential transformers up to 13 8KV The DDR2 provides output voltages VAG VBG VCG that are proportional to the phase to ground voltage and al...

Page 7: ...rrent sensor for each DSP DFM for current detection See Table 3 1 for typical requirements TABLE 3 1 SYSTEM MODULE REQUIREMENTS Catalog Number Description No Required System DSP DM Display Module 1 DS...

Page 8: ...un in separate conduit from Power wiring The recommended sensor wiring connections are shown in Figure 4 2 Two wires should be run from each sensor X1 and X2 as indicated to prevent cross coupling bet...

Page 9: ...TO HORN 12V DC PULSE OUT SYSTEM GROUND CONTROL 1A 1A Figure 4 1c Power Supply DSP DPS wiring DDR2 25VA CPT 120V OHMNI PM NGR MAIN BUS HORN 1A PULSE SIGNAL DSP DSM ZSCS BREAKER TRIP SIGNAL ALARM CONTA...

Page 10: ...he DSP CA module converts ribbon cable to an 8 conductor shielded cable for this purpose The DSP CAS does the same thing except that it includes an electronic switch to make or break the connections w...

Page 11: ...s a Form C type and should be connected to operate a horn or other means to alert an operator to the fact that a fault has occurred on the HRG system The contacts are rated at 10A 240VAC Resistive Fig...

Page 12: ...hielded but should be 14 AWG switchboard wire for durability 5 DISPLAY Following successful installation of the DSP system and connection of the control voltage the DSP DM display module should indica...

Page 13: ...creen or Alarm Screen is showing SETUP will not enter from any other screens If confused at any point press RESET and the Home Screen or Alarm Screen if a fault has occurred will be shown Figure 6 1 s...

Page 14: ...nding Resistor of the HRG system The default value is 1A To change the number use the pq arrows to increase decrease the digit under the ashing cursor and ut to change digits The nal value must be bet...

Page 15: ...IT WITHOUT WARNING DATA WILL NOT BE COLLECTED FROM SUCH MODULES ALTHOUGH THEY WILL CONTINUE TO PROVIDE FAULT PROTECTION Typically the numbers will be in the sequence 1 2 3 4 but they can be in any or...

Page 16: ...ht will turn on to indicate the received I D signal Press ENTER to complete the process The DSP DM will display either of the following messages depending on whether or not the setup was successful FM...

Page 17: ...oltage is 12V dc And the relay is therefore energized continuously The choice of NORMAL or INVERTED operation depends on how the Grounding Resistor current is connected If the Grounding resistor consi...

Page 18: ...ection X0 X0 X0 X0 X0 RG RG RG RG RP RP RP RP 5A 5A 2 5A 2 5A 5A 5 10 0 2 5 5 0 5 0 INVRT OFF INVRT ON INVRT ON INVRT ON INVRT OFF 5 10 0 2 5 5 0 a Pulse UP Parallel Resistors b Pulse Down Parallel Re...

Page 19: ...TE function The MUTE button normally disables the Alarm Relay and the local Beeper Alarm when pressed to following a fault However the designer might use the Alarm Relay for some other function for ex...

Page 20: ...ER to perform Self Test on the system See Self Test section for details See Section 9 for Self Test 7 OPERATION 7 1 Screen Navigation Normally with an un faulted system and recent RESET the Display Mo...

Page 21: ...und Current Igf for the Feeder is displayed as a percentage of the maximum Ground Current of the System A reading of would represent a direct short to ground for the Feeder while 00 represents no curr...

Page 22: ...p con guration If Pulsing is selected ON then it will remain ON until turned OFF again or RESET is pressed The Home screen will remind the Operator that pulsing is ON with the screen of Figure 7 6 PUL...

Page 23: ...system current as determined by the voltage from the DDR2 resistor unit See 8 1 above Note this may not be exactly the same as the Feeder Current Igf that is indicated in the Feeder Module Screen sinc...

Page 24: ...s side with a fault 9 SELF TEST Basic functionality testing of the system can be done without interrupting circuit breakers To enter the Test the operator must be in the Home Screen and without a faul...

Page 25: ...s ENTER to leave the Self Test and return to the Home Screen 10 EVENTS When a fault occurs suf cient to cause an alarm the event is recorded along with the fault current level and location so that it...

Page 26: ...ting with a damp cloth or vacuum cleaner during regular switchboard maintenance To test the DSP it will normally be suf cient to use the SELF TEST procedure as described in section 9 To test the syste...

Page 27: ...be referred to quali ed factory representatives other than direct replacement of entire Modules to I Gard Please visit the I Gard website for information regarding eld service representatives in your...

Page 28: ...ecksum is 16 bit CRC as described in MODBUS information The high bytes are not used in any requests If successful the DSP will return the message shown in Table 13 2 TABLE 13 2 RETURNED INFORMATION ST...

Page 29: ...hen the DSP processor will not be able to respond to a request since it is busy with other tasks and no response will be returned For this reason it is recommended to request the maximum number of reg...

Page 30: ...eder 37 Igf 40013 Feeder 13 Igf 40038 Feeder 38 Igf 40014 Feeder 14 Igf 40039 Feeder 39 Igf 40015 Feeder 15 Igf 40040 Feeder 40 Igf 40016 Feeder 16 Igf 40041 Feeder 41 Igf 40017 Feeder 17 Igf 40042 Fe...

Page 31: ...84 Feeder 34 Status 40060 Feeder10 Status 40085 Feeder 35 Status 40061 Feeder 11 Status 40086 Feeder 36 Status 40062 Feeder 12 Status 40087 Feeder 37 Status 40063 Feeder 13 Status 40088 Feeder 38 Stat...

Page 32: ...riority 40110 Feeder10 Priority 40135 Feeder 35 Priority 40111 Feeder 11 Priority 40136 Feeder 36 Priority 40112 Feeder 12 Priority 40137 Feeder 37 Priority 40113 Feeder 13 Priority 40138 Feeder 38 Pr...

Page 33: ...n nn lower byte is a composite byte upper nibble is Mode of operation while lower nibble of nn is pulse frequency 0 9 nn 0n Normal interlock OFF 1n Inverted interlock OFF 2n Normal interlock ON 3n Inv...

Page 34: ...4 5 6 7 8 9 10 11 12 13 14 15 16A Trip Level Current 100A Trip Level Delay 10xP 200mS Where P Priority setting Priority Levels 0 15 16 settings 14 5 Contact Ratings DSP DFM Trip Contacts Form C SPDT 1...

Page 35: ...ice 15 OUTLINE DIMENSIONS Figure 15 1 shows typical Dimensional details of the Polymeric enclosures used for the modules All have the same cross section dimensions but with different widths W as shown...

Page 36: ...I GARD DSP OHMNI Instruction Manual 34 4 25 108mm 6 50 165mm Drill two holes A No 36 TAP or No 23 Clearance 6 32 Screw A A Figure 15 2 DSP DM Display Module with cut out detail...

Page 37: ...SP DSM System Module Connection Figure 15 3 DSP DPS Power Supply Connections NC NO COM AC IN GND GND 20 conductor Ribbon To DSP DM 20 conductor Ribbon To DSP DSM 20 conductor Ribbon To DSP DSM 20 cond...

Page 38: ...DSP DPS To Next Device or Converter J1 Figure 15 6 DSP DM Display Module Connections 16 ADDITIONAL INFORMATION If you require more information or experience problems with your equipment that persist a...

Page 39: ...Ground Fault Relay Manual C 409 DSP OHMNI High Resistance Grounding System Manual C 102 Gemini High Resistance Grounding System Manual C 101 Stoplight High Resistance Grounding System Manual C 105 Fu...

Page 40: ...7615 Kimbel St Unit 1 Mississauga Ontario Canada L5S 1A8 Phone 905 673 1553 Toll Free 1 800 737 4787 Fax 905 673 8472 e mail sales i gard com www i gard com the power to protect...

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