Interactive Parameters

- for -

IEEE-IAS- by -

James S. Nasby

Columbia Engineering

C.E. IEEE-IAS 2

Topics to Be Covered

E.F.P.C. Interdependencies D.F.P.C. Interdependencies Variable Speed System Parameters

C.E. IEEE-IAS 3

Interactions Controller Dielectric Strength

Surge Arrester Transient Energy (Current) Goes Where? U.L. Test = 1.0 Kv + 2xVline = 2.0 Kv F.M. One Second (Factory) Test (Still Not Required by U.L.??)

= 1.2 (1.0Kv+2xVline = 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. IEEE-IAS 4

Interactions - cont'd

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) Electrostatic Isolation Improves Transient

Immunity

C.E. IEEE-IAS 5

Interactions - cont'd 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 Occuring Alarm Events Overwrite Pressure Records or vice versa.

Frequent Pressure Readings or Once Every Ten Minutes? Data Reduction used to Store More Usefull Data

(Changes)? How many Pressure Readings Stored?

C.E. IEEE-IAS 6

Interactions - cont'd

Internal Control Power Medium Voltage 115 Vac Secondary

Must Be Grounded by Code Ungrounded Low Voltage Secondary -

Allows for First Ground Fault Ungrounded D.C. Power - ditto

Corner & Ungrounded Systems -vs- Surge Arrester Option

C.E. IEEE-IAS 7

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. IEEE-IAS 8

Model ECHA in NEMA 4XC Enclosure

C.E. IEEE-IAS 9

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. IEEE-IAS 10

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. IEEE-IAS 11

Model ECHAw/ CabinetStrip HeaterHumidistat

Note: 150 Watt 230 Vac Heaters @ 115 Vac = 37.5 Watts = Safer

C.E. IEEE-IAS 12

Model ECV 250Hp:

- VFD NEMA 12 Back Box- Driphood- Cooler w/ Exterior Fan Inlet Air Filter

C.E. IEEE-IAS 13

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. IEEE-IAS 14

Model DCRWBA with 20 Amp Chargers for 400 A-H Batteries

NEMA 4 Version is in Two Door Enclosure

C.E. IEEE-IAS 15

Interactions - cont'd Alarms Needed Environmental System Monitoring & Telemetry

Others Interactions ?? Redundant pumps Redundant Water Supplies Redundant Power Supplies Dual Use Installations Other Special Conditions

C.E. IEEE-IAS 16

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. IEEE-IAS 17

Model ECV w/

- Model SRAP Alarm Set Concentrates Alarms

- Low Suction Pressure Alarm

- Weekly Test w/ Drain Solenoid Valve (was Optional)

C.E. IEEE-IAS 18

Close Up

C.E. IEEE-IAS 19

Questions ??