Interactive Parameters
- for -
F.M. Approvals- by -
James S. Nasby
Columbia Engineering
C.E. F.M. Approvals 2
Topics to Be Covered
E.F.P.C. Interdependencies D.F.P.C. Interdependencies Variable Speed System Parameters
C.E. F.M. Approvals 3
Interactions Controller Dielectric Strength
Surge Arrester Transient Energy (Current) Goes Where? U.L. Test = 1.0 Kv + 2xVline = 2.0 Kv One Second (Factory) Test (Still Not Required by U.L.??) = 1.2
(1.0Kv+xVline = 2.4 Kv) 5.0 Kvac or 6.0 KVdc Keeps Energy out of Controller
(Except for Surge Arrester)
One -vs- Three CPT's for D.C. Control Power Three Rectifier Circuits - Good (Triple Redundant) Three Isolated Rectifier Circuits - Best (Overcomes Rectifier
Short Circuits) Semiconductors Almost Always Fail as Short Circuits
(Especially due to Over Loads)
C.E. F.M. Approvals 4
Interactions Control Circuitry Always Powered?
Hard Wired Circuitry Can Be Isolated (Off-Line) in Standby Mode for Better Transient and Long Term Reliability
Microprocessor Designs have Boot-up Time Issues
Processor Boot Up Time -vs- Power Irregularities Recording
Separate Buffers for Alarm & Data? Rapidly Occurring Alarm Events Overwrite Pressure Records or vice versa.
Frequent Pressure Readings or Once Every Ten Minutes? Data Reduction used to Store More Useful Data
(Changes)? How many Pressure Readings Stored?
C.E. F.M. Approvals 5
Interactions - cont'dEnclosure Types
NEMA (U.L.) Type 2 Allows Pump Room Moisture and Contaminants to Enter
NEMA 4 Better (Must Pass Hose Test) NEMA 4X - Which Type?
4XA - Organic (Paint) Must Pass Different Salt Spray Test (UL-50 & Etc.)
4XB - Type 304 Stainless Steel (Must be Non-Magnetic; Type 4xx ferritic stainless steels are all Magnetic, while all Type 3xx austenitic stainless steels aren't.)
4XC - Type 316 Stainless (Difficult to Machine) 4XCL - Type 316L Low Carbon Stainless
Note that Welding Material and Brackets Must Match to Avoid Galvonic Corrosion and/or Poor Welds
C.E. F.M. Approvals 6
Model ECHA in NEMA 4XC Enclosure
C.E. F.M. Approvals 7
Interactions - cont'd Single Phase Start Protection -vs- Wide Area Single Phase Events. All Fire Pumps will Try to Start Sooner or
Later with Resulting Risk of Damage to Motor and/or Controller
Jockey Pumps will Normally not be Damaged since their Overload Relays will Trip on Single Phase Start Attempt.
Circuit Breaker Overload Curve -vs- Motor Damage -vs- Early Trip -vs- Single Phase Start Protection
C.E. F.M. Approvals 8
Interdependencies Power Supply, Controller, & Motor Environmental Conditions: Indoor, Outdoor, Temperature (High & Low) Variable Speed: Hydraulic Coordination Needed Duplex or Triplex Operation Pumps in Series Remote Demands Remote Speed Control
C.E. F.M. Approvals 9
Model ECHAwithCabinetStrip HeaterHumidistat
Note: 150 Watt 230 Vac Heaters @ 115 Vac = 37.5 Watts = Safer Lower Surface Temperature Operation
C.E. F.M. Approvals 10
Model ECV 250Hp:
Driphood
Cooler Exterior Fan Inlet Air Filter
VFD NEMA 12 Back Box
C.E. F.M. Approvals 11
Pressure Setting Coordination:Combined System Booster Pumps
C.E. F.M. Approvals 12
Pressure Setting Coordination:Fixed or Variable Speed Jockey
C.E. F.M. Approvals 13
Supply Pressure Variation
C.E. F.M. Approvals 14
DFPC Interdependencies Controller -vs- Engine Devices Controller -vs- Engine Batteries PLD Overpressure Alarm and Sensing ECM (ECU) Engine Add’l Alarms Controller -vs- Speed Switch Controller -vs- Other Pump House Loads Voltage Margins of Controller and Engine
C.E. F.M. Approvals 15
Model DCRWBA with 20 Amp Chargers for 400 A-H Batteries
NEMA 4 Version is in a Two Door Enclosure
C.E. F.M. Approvals 16
Interactions - cont'd
Alarms Needed Others Interactions ??
C.E. F.M. Approvals 17
Redundant Pump Interlocking
Redundant Fire Pump Interlock -by- Wm. F. Stelter
If redundant fire pumps are required, they may be arranged to prevent both pumps from starting and running simultaneously provided they meet the following:
1. Measurement of sufficient motor current on the primary fire pump within 10 seconds of the normal starting time shall prevent the redundant fire pump from starting and running.
2. Loss of the primary fire pump motor current for more than 10 seconds from the normal starting time, while an automatic call to start and run exists, shall cause the redundant fire pump to start, run and lockout the primary fire pump.
3. A motor overload of 125% or greater for 20 seconds shall cause the redundant fire pump to start and lockout the primary fire pump.
4. Turning off or disconnecting power to the primary fire pump controller shall not prevent the redundant fire pump from starting or running.
5. Turning off or disconnecting power to the redundant fire pump controller shall not prevent the primary fire pump from starting or running.
6. Once the primary fire pump is locked out, it shall remain locked out until manual reset.
7. Once the redundant fire pump is running, it shall remain running until manual reset.8. Either controller shall always be capable of being operated by local electrical starting
or manual mechanical starting regardless of any lockout that has occurred.9. A local visual alarm and remote contacts shall be provided to indicate that the primary
fire pump has been locked out.
File: Redundant Fire Pump Interlock.txt
C.E. F.M. Approvals 18
Redundant Fire Pump Interlock -as per- JSN suggested revisions
If redundant fire pumps are required, they may be arranged to prevent both pumps from starting and running simultaneously provided they meet the following:
1. Measurement of sufficient motor current on the primary fire pump within 10 seconds of the normal starting time shall prevent the redundant fire pump from starting and running.
2. Loss of the primary fire pump motor current for more than 10 seconds from the normal starting time, while an automatic call to start and run exists, shall cause the secondary (redundant) fire pump to start.
3. A motor overload of 125% or greater for 20 seconds shall cause the redundant fire pump to start and lockout the primary fire pump.
4. If sufficient motor current on the secondary (redundant) pump is detected, the secondary controller shall lockout the primary fire pump.
5. Turning off or disconnecting power to the primary fire pump controller shall not prevent the secondary redundant fire pump from starting or running.
6. Turning off or disconnecting power to the secondary redundant fire pump controller shall not prevent the primary fire pump from starting or running.
7. Once the primary fire pump is locked out, it shall remain locked out until manual reset.8. Once the secondary redundant fire pump is running, it shall remain running until manual reset.9. Either controller shall always be capable of being operated by local electrical starting or manual
mechanical starting regardless of any lockout that has occurred.10. A local visual alarm and remote contacts shall be provided to indicate that the primary fire
pump has been locked out.
File: Redundant Fire Pump Interlock_jsn-20070215.doc
Redundant Pump Interlocking
C.E. F.M. Approvals 19
Model ECV with:
Model SRAP Alarm Set (for Additional Tamper Alarm Inputs)
Weekly Test
Low Suction Pressure Alarm
C.E. F.M. Approvals 20
Close Up
C.E. F.M. Approvals 21
Questions ??