Medium-Voltage Control, Type Series 81000TM
Utilization Voltages 2.3 kV to 13.8 kV
General Information
- Description
- Typical Applications
- Types
- Enclosures
- Standards
- Vacuum Technology
- Power Fuses
- Ratings
- Extended Electrical Life
Siemens experience gained in over 50 years of supplying medium-voltage motor controllers in the U.S. has been captured in the Series 81000TM design. The Series 81000 medium-voltage motor controller has a modular design consisting of one or more contactors, housed in a freestanding sheet steel enclosure. Each controller is NEMA Class E2 and includes three current-limiting fuses. The enclosure is designed for front access, allowing the equipment to be located against a wall or back-to-back.
The design and manufacture of the Series 81000 medium-voltage controller unit is based on our experience as a leading manufacturer of motors worldwide. The benefits of this experience result in control scheme flexibility and increased safety, while simplifying operations, maintenance, and minimizing installation costs.
Series 81000 medium-voltage controllers are designed for use in industrial plants, commercial buildings, electric utility generating plants, cogeneration installations and other electrical systems.
The Siemens Series 81000 medium-voltage controller allows the user to combine vacuum contactors, latched contactors and load-break switches in one lineup. The user can also connect directly to Siemens type GM-SG medium-voltage metal-clad non-arc-resistant switchgear with a transition section. This provides extreme flexibility in systems design.
Typical Applications
The design and manufacture of the Series 81000 medium-voltage controller unit is based on our experience as a leading manufacturer of motors worldwide. The benefits of this experience result in control scheme flexibility and increased safety, while simplifying operations, maintenance, and minimizing installation costs.
Typical applications include:
- Squirrel-cage induction motors (non-reversing, reversing or multi-speed)
- Reduced-voltage starters (autotransformer, reactor or solid-state type)
- Synchronous motors (brushless type)
- Transformer feeders
- Capacitor bank feeders
- Power bus feeders (tie).
The utlization voltage range for controllers is 2.3 kV through 13.8 kV.
Types
Drawout controllers include:
- Full-voltage non-reversing (FVNR)
- Reduced-voltage primary reactor (RVPR) (Consult factory.)
- Reduced-voltage autotransformer (RVAT)
- Reduced-voltage solid-state (SSRV)
- Brushless synchronous (BL-SYNCH)
- Brushtype synchronous (BT-SYNCH) (Consult factory.)
- Two-speed two-winding (2S2W)
- Two-speed one-winding (2S1W)
- Reversing.
Load-break switches (LBS).
Enclosures
Available in a variety of styles to meet most applications, enclosure types include:
- NEMA 1 non-gasketed
- NEMA 1A gasketed
- NEMA 2 drip-proof
- NEMA 12 dust-tight
- NEMA 3R non-walk-in
- NEMA 3R walk-in.
External finish is ANSI 61 light gray polyester, electrostatically applied. Special colors and finishes are optionally available.
Standards
The key standards applicable to medium-voltage controllers are:
- NEMA ICS 3-2005, part 1
- UL-347
- NEC (Article 490).
Series 81000 controllers with vacuum contactors comply fully with these standards, and can be povided in compliance with speciality standards, such as the California code.
The Series 81000 offers a broad range of UL (and C-UL) class E2 controllers. Consult your locak Siemens representative for information on UL Listing (or C-UL) status for specific projects.
Vacuum Technology
Series 81000 controllers utilizing type 97H3, 96H6 or 3TL71 vacuum contactors offer extended service life and provide long mechanical and electrical life with minimimal maintenance.
Arc interruption is completely contained within vacuum interrupters, eliminating the need for arc chutes, blowout coils, pole plates and similar wear items.
Contactors Class E1 Unfused
NEMA refers to this unfused, magnetically held device as a class E1 controller. Type 97H3 (360 A) vacuum contactors are rated 5 kA (up to 5.0 kV) and 4.2 kA (up to 7.2 kV) interrupting capacity, while the type 96H6 (720 A) vacuum contactor is rated 7.2 kA interrupting capacity up to 7.2 kV. Type 3TL71 (300 A) vacuum contactor is rated 3.0 kA interrupting capacity up to 13.8 kV.
Contactors Class E2 Fused
To meet interrupting capability required for NEMA class E2 controllers, types 97H3, 96H6 and 3TL71 contactors are provided with primary current-limiting fuses in all three phases. The resulting interrupting ratings are shown the tables on the Ratings tab.
Power Fuses
The current limiting fuses used with type 97H3 vacuum contactors are ANSI Class "R" type FM (up to 4.8 kV) and type A720R (over 4.8 kV and up to 7.2 kV) rated for motor starting duty.
Class "E" fuses, used for non-motor-loads such as transformers and capacitor banks, can also be provided in Series 81000 controllers.
Class "E" fuses, type CL-14 are used for full-voltage and solid-state, reduced-voltage starters above 7.2 kV up to 13.8 kV.
| System Rating | kV | 2.3 | 2.3 | 4.0 | 4.0 |
| Vacuum Contactor | Type | 97H3 | 96H6 | 97H3 | 96H6 |
| Enclosed Continous Ampere Rating | A | 360 | 720 | 360 | 720 |
| Interrupting Capacity | Unfused Class E1 kA | 5 | 7.2 | 5 | 7.2 |
| Interrupting Capacity | Fused Class E2 kA | 50 | 50 | 50 | 50 |
| Motor Horsepower Rating (Three-Phase) | Synchronous Motors 0.8 PF | 1,500 | 3,000 | 2,500 | 5,500 |
| Motor Horsepower Rating (Three-Phase) | Synchronous Motors 1.0 PF | 1,750 | 3,500 | 3,000 | 6,000 |
| Motor Horsepower Rating (Three-Phase) | Induction Motors HP | 1,500 | 3,000 | 2,500 | 5,500 |
| Motor Horsepower Rating (Three-Phase) | Maximum Motor Fuse Rating | 24R | 57X | 24R | 57X |
| Transformer Loads | Maximum Three-Phase kVA | 1,500 | 2,000 | 2,500 | 3,500 |
| Tramsformer Loads | Maximum Fuse Rating | 450E | 600E | 450E | 600E |
| System Rating | kV | 4.6 | 4.6 | 6.91 | 6.91 | 13.8 |
| Vacuum Contactor | Type | 97H3 | 96H6 | 97H3 | 96H6 | 3TL71 |
| Enclosed Continous Ampere Rating | A | 360 | 720 | 360 | 720 | 300 |
| Interrupting Capacity | Unfused Class E1 kA | 5 | 7.2 | 4.2 | 7.2 | 3.0 |
| Interrupting Capacity | Fused Class E2 kA | 50 | 50 | 50 | 50 | 50 |
| Motor Horsepower Rating (Three-Phase) | Synchronous Motors 0.8 PF | 2,500 | 5,500 | 4,000 | 7,000 | 5,500 |
| Motor Horsepower Rating (Three-Phase) | Synchronous Motors 1.0 PF | 3,000 | 6,000 | 5,000 | 7,500 | 6,000 |
| Motor Horsepower Rating (Three-Phase) | Induction Motors HP | 2,500 | 5,500 | 4,000 | 7,000 | 5,500 |
| Motor Horsepower Rating (Three-Phase) | Maximum Motor Fuse Rating | 24R | 57X | 24R | 57X | 300E |
| Transformer Loads | Maximum Three-Phase kVA | 2,500 | 4,000 | 1,500 | 2 | 5,500 |
| Transformer Loads | Maximum Fuse Rating | 450E | 600E | 200E | 2 | 300E |
Footnotes:
1 Nominal motor voltage 6.6 kV. (Temporary overvoltage of 7.6 kV.)
2 Consult factory.
Extended Electrical Life
Since arc interruption takes place in a sealed environment within the vacuum interrupter, arcing times are very short. As a result, arc erosion of the contacts is minimal, and an operating life of 250,000 operations at rated load-current is typical.