Heavy Duty Copper, 30º C Rise Vertical Break Switches Type: TH1 Orientation: Horizontal, Vertical, Underhung Ratings: 7.5 kV through 161 kV Ratings A: 600, 1200, Amperes Request Bulletin B103 Download PDF Catalog

The Type "TH1" is an all-copper, rotating-stack, vertical-break, group-operated, heavy-duty, airbreak switch. Its all-copper, heavy-duty construction delivers a full 30 degree C temperature rise rating, not the higher 53 degree C temperature rise rating so prevalent today.

It's what we call Switch-Ability!

Turner's "TH1" switch has accumulated more than 47 years of successful field experience. That means you get an easily installed, easily operated heavy-duty switch that provides maximum mechanical and electrical performance under all operating conditions.

Its heavy-duty construction, proven reliability and ease of operation makes the "TH1" perfect for demanding substation and line operations such as bus transfer, by-passing and disconnecting breakers, sectionalizing, and isolating arrestors and other equipment.

Internal construction is both simple and functional. The three-moving-part mechanism, permanently lubricated bronze bearings on live parts, and greaseless ball bearing assembly for the rotating insulator provide smooth, easy operation. A highly conductive current path is provided by braidless, sealed, continuous silver-to-copper hinge contacts and silver-to-copper jaw contacts (silver-to-silver jaw current transfer is also available). All materials in the "TH1" have been specially selected for the application.

Installation is easy, and control mechanism connections are simple and positive. Whether installed in substations, or on transmission structures, these switches can be mounted upright, vertical or underhung.

All switch adjustments are factory set, and, as an option, insulators can be factory installed on some ratings.

In short, the "TH1" switch has been designed to incorporate the features and benefits today's system designer needs in a heavy duty switch of this type.

Type "TH1" Operating Features

The simply designed blade-actuating mechanism has only three moving parts. It provides positive, all-position control of the blade throughout the complete opening-closing cycle. No auxiliary latches, cams or other mechanisms are employed. The switch operates smoothly and easily. Factory-set blade stops assure proper positioning of blades in the opened and closed positions.

The turning motion of the blade before entering or leaving contacts applies and releases contact pressure with a minimum of operating effort. This action also wipes contacts clean on closing, and breaks accumulations of ice out of the jaw on opening. Only two crank arms are used to achieve the lift-and-turn motion, providing a minimum of exposed mechanism, while at the same time maintaining direct control of the blade in all positions. Blade response is instantaneous and secure positioning is assured when opened and when closed.

The blade assembly is pivoted so that the longitudinal axis of the blade and the center of gravity of the assembly is considerably behind the pivot point when the blade is in the open position.

To facilitate smooth operation on switches 69 kV and above, each is provided with an enclosed blade counterbalancing spring.

Hinge Mechanism (click for photo)
The current by-passes any moving bearings or moving threads. All parts in the current path are either copper or high-conductivity copper alloy and no current carrying springs are employed. The Omega-shaped hinge shunt is a silver-plated strap encircling approximately 75 per cent of the blade. High pressure is applied to the shunt by a silver-plated, threaded trunnion, keeping the blade in continuous contact throughout the complete operating cycle. The entire hinge contact area is enclosed on the "TH1" switch, eliminating a possible maintenance area. Not only do the contacts have no chance to separate, they are protected from the environment, therefore they do not corrode or oxidize.

Blade/Jaw Contacts (click for photo)
The high-pressure contact shoes are of hard-drawn, high-conductivity copper. Constant pressure is applied to the contact shoes by independent Beryllium-copper springs. Each contact shoe and back-up spring is attached with two silicon-bronze bolts. One bolt is self-locking, serving as an adjustment for the contact pressure. Although contact pressure is factory-adjusted, should field adjustment ever be necessary, it can easily be made with a standard wrench. In addition, contact change out is fast and easy.

The tubular blade is designed of hard-drawn copper to provide the proper combination of current-carrying capacity and rigidity. The blade tip is Beryllium-copper, heat treated with coin silver overlays that provide high pressure, silver-to-copper contact with the copper jaw surfaces when the tip is rotated into the jaw. The 600 Ampere "TH1" has a single set of silver-to-copper contacts, while the 1200 Ampere version has a double set.

The blade twists into the jaw contacts to form a high-pressure contact, keeping the blades closed under the most punishing winter storms. They remain closed during temporary faults or high surge currents.

Blade Stops
The full open and closed positions of the switch blade are determined by stops on the mechanism above the insulators. Factory-set, they can also be adjusted in the field.

Optional factory-set, field-adjustable base mounted bearing stops provide proper alignment of crank arms for quick, easy installation of control mechanisms.

Main Bearing Assembly (click for photo)
The main pivot bearing consists of two tapered Timken roller bearings, which are adjusted and lubricated at the factory and require no further attention for the life of the switch. These bearings are protected with a Neoprene seal and permanently sealed at the bottom with a Welsh-type plug. This unit will accommodate cap-and-pin or post-type insulators without the use of an extra casting.

Four leveling screws are provided on the sub-base of each insulator stack, to facilitate easy alignment after assembling the insulators on the switch. Adjusting the screws raises or lowers the end of the switch blade.

Tightening the insulator bolts holds the alignment fast.

Leveling screws are also provided on all stationary insulator pedestals.

Full Load Vacuum Interrupters

The Turner TECO-Rupter is a vacuum circuit interrupter that is offered as an attachment to the Turner "TH1" switch, as well as designs of other switch manufacturers. It is offered in three (3) basic configurations and can be attached to vertical break, side break, hookstick and some center break switch designs. The configurations are as follows:

1. Loop or parallel break - Normally these are single vacuum contact devices that can interrupt up to 2000 Amps, up to 230 kV, under paralleled conditions, (i.e., rated voltage exists on both the hinge and jaw of the switch immediately after the interrupter is opened). The transient recovery voltage must not exceed 30 kV for the single contact. More contacts can be added to address higher recovery voltages; consult factory.
2. Line/bus charging/line sectionalizing interruption/transformer magnetizing current interruption - A full voltage multiple stack interrupter may be utilized from 15 kV through 230 kV for interruption of line or bus charging currents and transformer magnetizing currents up to a value of 70 Amps at 0% power factor, capacitive or inductive. The nameplate operating current of the switch is not a factor in the application of this device.
3. Load interruption - A full voltage multiple stack interrupter may be applied from 15 kV through 230 kV for interruption of actual load current at 70% power factor.

The TECO-Rupter is only in the circuit during the opening sequence, (normally one [1] to two [2] seconds in duration). Also, contact test studs on the exterior of the enclosure allow you to independently Hi-Pot each vacuum contact when the actuating arm is in the open position at 30 kV.

Turner's Fast-Switch Program Standard Substation Controls

7.5 kV to 34.5 kV - Pole Mounted
7.5 kV to 69 kV - Structure Mounted

Turner offers you the ability to choose your delivery schedule, based on your switch requirements. You can select from a variety of "Standard" switch, base and operating mechanism designs (through 69 kV) that will, in effect, save you many weeks of lead time, when compared to the time required to produce a "Custom Design."

Controls can be supplied for clockwise or counterclockwise opening if requested, or may be changed in the field as necessary.

Turner Electric's standard operating mechanism for vertical-break switches consist of vertical steel operating pipe, with or without an 8-foot fiberglass insulating section; a steel or fiberglass interphase shaft, with self-piercing set screw clevises for coupling and pinning to switch crank arm and vertical pipe guides. An outboard bearing assembly to support the operating pipe is provided. Universal joints in vertical control pipe (when required on offset mountings), and a swing handle with ground shunt and padlock provision is standard. A worm gear operator is provided when required. Motor operators are also available.

Standard Design - Fast-Switch Ordering Information

Dimensions - Inches						Catalog Number
kV	A	B	C	D	E	Type HO1-SS	Type U01-SS	Type V01-SS
7.5	36	96	84	13	12	92800	92806	92812
1.5	36	96	84	13	15	92801	92807	92813
23	48	96	108	13	18	92802	92808	92814
34.5	60	120	132	16	24	92803	92809	92815
46	72	120	156	16	30	92804	92810	92816
69	84	120	180	18	42	92805	92811	92817

When ordering a Pole Mounted Fast-Switch, use the two-digit suffix after the catalog number to specify operating mechanism requirements.

Control Type Definition:
Type SS - Steel interphase, steel vertical control pipe
Type WS - Fiberglass interphase, steel vertical control pipe
Type WW - Fiberglass interphase, 8 ft. fiberglass vertical
Type SW - Steel interphase, 8 ft. fiberglass vertical control insert

Fast-Switch Program
Pole Top Mount Platforms
Turner Electric manufactures a complete line of galvanized steel and Aluminum switch mounting platforms for virtually any switch application. Examples of single, two and three pole platforms are listed. Also available are platforms for four and six pole structures. Turner Electric will also design and fabricate platforms for special applications.

Standard or custom switch mounting frames fabricated from either structural Aluminum or hot galvanized steel can be supplied as optional items. Assembly bolts, excluding through-bolts, are furnished. Units are shipped coded for ease of assembly.

Ordering information for Standard Type "TH1" Heavy Duty, Copper,
30ºC Rise Vertical Break Switches - 7.5 kV through 161 kV.

In addition to the Standard Designs referenced below, Turner can custom design vertical break switches to your specific system requirements.

Ordering Information
Switch Rating			Station Post	Catalog Number – Three Pole Sw1tch			Approximate Weight in Pounds
Voltage	Amperes		Technical Ref. No.	Horizontal	Vertical	Underhung	Net per pole	Shipping 3-pole inc crate & controls
	Cont.	Momen.
7.5 kV (95 BIL)	600	40,000	TR202	TH100706/8000T	TH1V00706/8100T	TH1U00706/8200	129	770
	1200	61,000		TH100712/8001T	TH1V00712/8101T	TH1U00712/8201	151	850
	2000	100,000		TH100720/8075T	TH1V00720/8175T	TH1U00720/8275	273	1333
15 kV (110 BIL)	600	40,000	TR205	TH101506/8002T	TH1V01506/8102T	TH1U01506/8202	141	820
	1200	61,000		TH101512/8003T	TH1V01512/8103T	TH1U01512/8203	162	880
	2000	100,000		TH101520/8076T	TH1V01520/8176T	TH1U01520/8276	291	1370
23 kV (150 BIL)	600	40,000	TR208	TH102306/8004T	TH1V02306/8104T	TH1U02306/8204	175	940
	1200	61,000		TH102312/8005T	TH1V02312/8105T	TH1U02312/8205	197	1005
	2000	100,000		TH102320/8077T	TH1V02320/8177T	TH1U02320/8277	333	1502
34.5 kV (200 BIL)	600	40,000	TR210	TH103406/8006T	TH1V03406/8106T	TH1U03406/8206	244	1102
	1200	61,000		TH103412/8007T	TH1V03412/8107T	TH1U03412/8207	269	1280
	2000	100,00		TH103420/8007T	TH1V03420/8178T	TH1U03420/8278	418	1790
46 kV (250 BIL)	600	40,000	TR214	TH104606/8008T	TH1V04606/8108T	TH1U04606/8208	299	1402
	1200	61,000		TH104612/8009T	TH1V04612/8109T	TH1U04612/8209	325	1480
	2000	100,000		TH104620/8079T	TH1V04620/8179T	TH1U04620/8279	483	1999
69 kV (350 BIL)	600	40,000	TR216	TH106906/8041T	TH1V06906/8110T	TH1U06906/8210	476	2216
	1200	61,000		TH106912/8011T	TH1V06912/8111T	TH1U06912/8211	497	2280
	2000	100,000		TH106920/8080T	TH1V06920/8180T	TH1U06920/8280	677	2821
115 kV (550 BIL)	600	40,000	TR286	TH111506/8012T	TH1V11506/8112T	TH1U11506/8212	970	3210
	1200	61,000		TH111512/8013T	TH1V11512/8113T	TH1U11512/8213	995	3285
	2000	100,000		TH111520/8081T	TH1V11520/8181T	TH1U11520/8281	1217	3868
138 kV (650 BIL)	600	40,000	TR288	TH113806/8014T	TH1V13806/8114T	TH1U13806/8214	1075	3575
	1200	61,000		TH113812/8015T	TH1V13812/8115T	TH1U13812/8215	1097	3641
	2000	100,000		TH113820/8082T	TH1V13820/8182T	TH1U13820/8282	1341	4246
161 kV (750 BIL)	600	40,000	TR291	TH116106/8016T		TH1U16106/8216	1189	4217
	1200	61,000		TH116112/8017T		TH1U16112/8217	1212	4286
	2000	100,000		TH116120/8083T		TH1U16120/8283	1476	4911
	600	40,000	TR295		TH1V16106/8116T		1339	4667
	1200	61,000			TH1V16112/8117T		1362	4736
	2000	100,000			TH1V16120/8183T		1626	4886

NOTE: Shipping weights include insulators